US6760882B1 - Mode selection for data transmission in wireless communication channels based on statistical parameters - Google Patents
Mode selection for data transmission in wireless communication channels based on statistical parameters Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
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- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
- H04L1/0021—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach in which the algorithm uses adaptive thresholds
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- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
Definitions
- the present invention relates generally to wireless communication systems and methods, and more particularly to mode selection for encoding data for transmission in a wireless communication channel based on statistical parameters.
- Wireless communication systems serving stationary and mobile wireless subscribers are rapidly gaining popularity. Numerous system layouts and communications protocols have been developed to provide coverage in such wireless communication systems.
- Wireless communications channels between transmit and receive devices are inherently variable and their quality fluctuates.
- the quality parameters of such communications channels vary in time.
- wireless channels exhibit good communication parameters, e.g., large data capacity, high signal quality, high spectral efficiency and throughput. At these times significant amounts of data can be transmitted via the channel reliably.
- the communication parameters also change. Under altered conditions former data rates, coding techniques and data formats may no longer be feasible.
- the transmitted data may experience excessive corruption yielding unacceptable communication parameters.
- transmitted data can exhibit excessive bit-error rates or packet error rates.
- the degradation of the channel can be due to a multitude of factors such as general noise in the channel, multi-path fading, loss of line-of-sight path, excessive Co-Channel Interference (CCI) and other factors.
- CCI Co-Channel Interference
- signal degradation and corruption is chiefly due to interference from other cellular users within or near a given cell and multipath fading, in which the received amplitude and phase of a signal varies over time.
- the fading rate can reach as much as 200 Hz for a mobile user traveling at 60 mph at PCS frequencies of about 1.9 GHz.
- the problem is to cleanly extract the signal of the user being tracked from the collection of received noise, CCI, and desired signal portions.
- FWA Fixed Wireless Access
- Prior art wireless systems have employed adaptive modulation of the transmitted signals with the use of feedback from the receiver as well as adaptive coding and receiver feedback to adapt data transmission to changing channel conditions.
- Such adaptive modulation is applied to Single Input Single Output (SISO) and Multiple Input Multiple Output (MIMO) systems, e.g., systems with antenna arrays at the transmit and receive ends.
- SISO Single Input Single Output
- MIMO Multiple Input Multiple Output
- U.S. Pat. No. 6,044,485 to Dent et al. teaches a transmission method and system which adapts the coding of data based on channel characteristics.
- the channel characteristics are obtained either from a channel estimation circuit or from an error feedback signal.
- SNR signal-to-noise
- a different coding is applied to the data being transmitted for high and low SNR states of the channel.
- the encoding also employs information derived from the cyclic redundancy check (CRC).
- CRC cyclic redundancy check
- Dent varies the coding rate only and not the modulation rate. This method does not permit one to select rapidly and efficiently from a large number of encoding modes to adapt to varying channel conditions.
- U.S. Pat. No. 5,559,810 to Gilbert et al. teaches a communication system using data reception history for selecting a modulation technique from among a plurality of modulation techniques to thus optimize the use of communication resources. At least one block of data is transmitted with a particular modulation technique and a data reception history is maintained to indicate transmission errors, e.g., by keeping a value of how many blocks had errors. The data reception history is updated and used to determine an estimate of transmission signal quality for each modulation technique. This value is then used in selecting the particular modulation technique.
- MIMO Multiple Input Multiple Output
- MISO Multiple Input Single Output
- SISO Single Input Single Output
- SIMO Single Input Multiple Output
- the present invention provides a method for selecting a mode for encoding data for transmission in a wireless communication channel between a transmit unit and a receive unit.
- the data is first encoded in accordance with an initial mode and transmitted from the transmit unit to the receive unit.
- One or more quality parameters are sampled in the data received by the receive unit.
- a first-order statistical parameter and a second-order statistical parameter of the quality parameter are computed and used for selecting a subsequent mode for encoding the data.
- the one or more quality parameters can include a short-term quality parameter or several short-term quality parameters and be selected among parameters such as signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR) and power level.
- a first sampling time or window is set during which the short-term quality parameter is sampled.
- the length of the first sampling window is based on a coherence time of the wireless communication channel.
- the duration of the first sampling window is based on a delay time required to apply the subsequent mode to encode the data at the transmit unit.
- the second-order statistical parameter is a variance of the short-term quality parameter and the length of the first sampling window is selected on the order of the variance computation time.
- the one or more quality parameters can also include a long-term quality parameter or several long-term quality parameters.
- the long-term quality parameter can be an error rate of the data, such as a bit error rate (BER) or a packet error rate (PER) at the receive unit.
- BER bit error rate
- PER packet error rate
- the first-order statistical parameter is a mean of the long-term quality parameter and the length of the second sampling window is set on the order of the-mean computation time.
- the length of the second sampling window is set on the order of an error rate computation time.
- the first-order statistical parameter is a mean of the quality parameter and the second-order statistical parameter is a variance of the quality parameter.
- the variance can include two variance types: a temporal variance and a frequency variance. The latter is useful in systems employing multiple frequencies for transmitting the data. Specifically, it is particularly convenient to compute both temporal and frequency variances when the data is transmitted in accordance with a multi-carrier scheme.
- the initial mode for encoding the data can be selected from a set of modes.
- the set of modes can be made up of a number of modes which are likely to work based on a preliminary analysis of the channel.
- the set of modes can be organized in accordance with the at least one quality parameter whose first-order and second-order statistics are used in subsequent mode selection.
- the subsequent mode is communicated to the transmit unit and applied to the data to maximize a communication parameter in the channel.
- the subsequent mode can maximize data capacity, signal quality, spectral efficiency or throughput of the channel or any other communication parameter or parameters as desired.
- the method of the invention can be used in Multiple Input Multiple Output (MIMO), Multiple Input Single Output (MISO), Single Input Single Output (SISO) and Single Input Multiple Output (SIMO) communication systems, e.g., receive and transmit units equipped with multiple antennas. Furthermore the method can be used: in communication systems employing various transmission protocols including OFDMA, FDMA, CDMA, TDMA.
- MIMO Multiple Input Multiple Output
- MISO Multiple Input Single Output
- SISO Single Input Single Output
- SIMO Single Input Multiple Output
- the method of invention can also be used for selecting the mode from a set of modes and adjusting the selection.
- data encoded in an initial mode selected from the set of modes is received by the receive unit.
- the short-term quality parameter is then sampled to determine a statistical parameter of the short-term quality parameter.
- the statistical parameter can include any combination of first-order and second-order statistical parameters.
- the subsequent mode is selected based on the short-term statistical parameter.
- the long-term quality parameter of the data received by the receive unit is also sampled.
- the subsequent mode selected based on the short-term statistical parameter is then adjusted based on the long-term quality parameter.
- the set of modes can be arranged in any suitable manner, e.g., it can be arranged in a lookup table and ordered by the short-term quality parameter and specifically the first-order and/or second-order statistics of the short-term quality parameter for easy selection.
- the lookup table can be modified based on the short-term quality parameter.
- the invention also encompasses a system for assigning a subsequent mode for encoding data.
- the system has a transmit unit equipped with a transmit processing block for encoding the data in a mode.
- a receive unit is provided for receiving the data transmitted from the transmit unit.
- the receive unit has a statistics computation block for sampling at least one quality parameter of the received data and computing the first-order and second-order statistical parameters of the data.
- the receive unit also has a mode selection block for assigning the subsequent mode based on the first-order and second-order statistical parameters.
- the system has at least one database containing the set of modes from which the mode, e.g., the initial mode, and the subsequent mode are selected.
- the receive has a first database containing the modes and the transmit unit has a second such database.
- the system also has a feedback mechanism for communicating the subsequent mode from the receive unit to the transmit unit.
- This feedback mechanism can be a separate mechanism or comprise the time-division duplexing (TDD) mechanism.
- FIG. 1 is a simplified diagram illustrating a communication system in which the method of the invention is applied.
- FIG. 2 is a graph illustrating the effects of channel variation in time and frequency.
- FIG. 3 is a block diagram of an exemplary transmit unit in accordance with the invention.
- FIG. 4 is a block diagram of an exemplary receive unit in accordance with the invention.
- FIG. 5 is a schematic diagram illustrating data transmitted in a wireless communication channel.
- FIG. 1 illustrating a portion of a wireless communication system 10 , e.g., a cellular wireless system in which the method of invention can be employed.
- a wireless communication system 10 e.g., a cellular wireless system in which the method of invention can be employed.
- downlink communication will be considered where a transmit unit 12 is a Base Transceiver Station (BTS) and a receive unit 14 is a mobile or stationary wireless user device.
- BTS Base Transceiver Station
- the method can be used in uplink communication from receive unit 14 to BTS 12 .
- Exemplary user devices 14 include mobile receive units such as a portable telephone 14 A, a car phone 14 B and a stationary receive unit 14 C.
- Receive unit 14 C can be a wireless modem used at a residence or any other fixed wireless unit.
- Receive units 14 A and 14 C are equipped with multiple antennas or antenna arrays 20 . These receive units can be used in Multiple
- Receive unit 14 B has a single antenna 1 l and can be used in Single Input Single Output (SISO) communications.
- SISO Single Input Single Output
- receive units 14 A, 14 B, 14 C could be equipped in SISO, MISO (Multiple Input Single Output), SIMO (Single Input Multiple Output), or MIMO configurations.
- MISO configuration can be realized in the case of 14 B for example by receiving signals from the antenna array at BTS 12 A or from distinct BTS such as 12 B, or any combination thereof.
- multiple receive antennas 14 B, as 14 A and 14 C could also be used in SIMO or MIMO configurations.
- the communications techniques can employ single-carrier or multi-carrier communications techniques.
- a first exemplary transmit unit 12 is a BTS 12 A equipped with an antenna array 16 consisting of a number of transmit antennas 18 A, 18 B, . . . , 8 M for MIMO communications.
- Another exemplary transmit unit 12 is a BTS 12 B equipped with a single omnidirectional antenna 13 .
- BTSs 12 A, 12 B send data in the form of transmit signals TS to receive units 14 A, 14 B, 14 C via wireless communications channels 22 . For simplicity, only channel 22 A between BTS 12 A and receive unit 14 A and channel 22 B between BTS 12 B and receive unit 14 C are indicated.
- the time variation of channels 22 A, 22 B causes transmitted signal TS to experience fluctuating levels of attenuation, interference, multi-path fading and other deleterious effects.
- communication parameters of channel 22 A such as data capacity, signal quality, spectral efficiency and throughput undergo temporal changes.
- the cumulative effects of these variations of channel 22 A between BTS 12 A and receive unit 14 A are shown for illustrative purposes in FIG. 2 .
- this graph shows the variation of a particular quality parameter, in this case signal strength of receive signal RS at receive unit 14 A in dB as a function of transmission time t and frequency f of transmit signal TS sent from transmit unit 12 A.
- Similar graphs can be obtained for other quality parameters, such as signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR) as well as any other quality parameters known in the art.
- SINR signal strength
- SNR are generally convenient to use because they can be easily and rapidly derived from receive signals RS as is known in the art.
- a mode for encoding data at transmit units 14 is selected based on a first order statistical parameter and a second order statistical parameter of the quality parameter.
- the details of the method will now be explained by referring to the operation of a transmit unit 50 , as illustrated in FIG. 3 and a receive unit 90 as illustrated in FIG. 4 .
- Transmit unit 50 receives data 52 to be transmitted; in this case a stream of binary data.
- Data 52 is delivered to a transmit processing block 56 .
- Transmit processing block 56 subdivides data 52 into a number k of parallel streams. Then, processing block 56 applies an encoding mode to each of the k streams to thus encode data 52 .
- transmission data 52 may be interleaved and pre-coded by an interleaver and a pre-coder (not shown). The purpose of interleaving and pre-coding is to render the data more robust against errors. Both of these techniques are well-known in the art
- the mode is determined by a modulation during which data 52 is mapped into a constellation at a given modulation rate, and a coding rate at which this translation is performed.
- data 52 can be converted into symbols through modulation in a constellation selected from among PSK, QAM, GMSK, FSK, PAM, PPM, CAP, CPM or other suitable constellations.
- the transmission rate or throughput of data 52 will vary depending on the modulation and coding rates used in each of the k data streams.
- Table 1 illustrates some typical modes with their modulation rates and coding rates and the corresponding throughputs for data 52 .
- the modes are indexed by a mode number so as to conveniently identify the modulation and coding rates which are to be applied to data 52 in each mode.
- Lookup tables analogous to Table 1 for other coding and modulation rates can be easily derived as these techniques are well-known in the art.
- a set of modes is stored in a database 78 of transmit unit 50 .
- Database 78 is connected to a controller 66 , which is also connected to transmit processing block 56 and spatial mapping unit 58 .
- Controller 66 controls which mode from database 78 is applied to each of the k streams and spatial mapping to be performed by spatial mapping unit 58 .
- transmit processing block 56 adds training information into training tones T (see FIG. 5) and any other control information, as is known in the art.
- the k streams are sent to an up-conversion and RF amplification stage 70 having individual digital-to-analog converters and up-conversion/RF amplification blocks 74 through the spatial mapping unit 58 .
- the spatial mapping unit 58 maps the k streams to M inputs of the up-conversion and RF amplification stage 70 .
- the M outputs of amplification stage 70 lead to corresponding M transmit antennas 72 of an antenna array 76 .
- the number M of transmit antennas 72 does not have to be equal to the number of streams k. That is because various spatial mappings can be employed in assigning streams k to transmit antennas 72 . In one mapping, a certain transmit antenna 72 B transmits one of the k streams. In another mapping, a number of transmit antennas 72 transmit the same stream k. In yet another embodiment, the k streams are assigned to M antennas 72 or a subset thereof via the spatial mapping unit 58 and the unit 70 . In fact, any kind of mapping involving the use of spatial multiplexing (SM) and antenna diversity can be used in the method and system of the invention.
- SM spatial multiplexing
- Transmit antennas 72 transmit data 52 in the form of transmit signals TS.
- FIG. 5 illustrates, as will be recognized by those skilled in the art, a multicarrier transmission scheme with n frequency carriers (tones). The vertical axis illustrates frequency carriers while the horizontal axis illustrates OFDM symbol periods. Each block corresponds to one of n frequency carriers, during an OFDM symbol. The blocks marked with D correspond to data and the blocks marked with T correspond to training.
- FIG. 5 indicates that training is performed on all tones during an OFDM training symbol, it will be clear to a person skilled in the art that a subset of these tones could be used for training and the corresponding frequency response could be computed at the receiver by interpolating.
- Transmit signals TS propagate through channel 22 and there experience the effects of changing conditions of channel 22 , as described above.
- Transmit signals TS are received in the form of receive signals RS by a receive antenna 91 A belonging to an antenna array 92 of a receive unit 90 , shown in FIG. 4 .
- receive unit 90 has N receive antennas 91 A, 91 B, . . . , 91 N for receiving receive signals RS from transmit unit 50 .
- Receive unit 90 can be any suitable receiver capable of receiving receive signals RS via the N receive antennas 92 .
- Exemplary receivers include linear equalizer receivers, decision feedback equalizer receivers, successive cancellation receivers, and maximum likelihood receivers.
- Receive unit 90 has an RF amplification and down-conversion stage 94 having individual RF amplification/down-conversion/and analog-to-digital converter blocks 96 associated with each of the N receive antennas 91 A, 91 B, . . . , 91 N.
- the N outputs of stage 94 are connected to a receive processing block 98 which performs receive processing to recover the k streams encoded by transmit processing block 56 of transmit unit 50 .
- the recovered k streams are passed on to a signal detection, decoding and demultiplexing block 100 for recovering data 52 .
- antenna diversity processing it should be understood that k is equal to one thus there is only a single stream recovered.
- the receive processing block 98 computes the quality parameters for each of k streams and sends this information to a statistics computation block for computing statistical parameters of the one or more quality parameters.
- the method of the invention can recognize slow and rapid channel variations and allows for efficient mode selection by taking both types of variations into account. This is accomplished by taking into account at least two statistics of one or more quality parameters. This may include either or both short-term and long-term quality parameters. Suitable short-term quality parameters include signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR) and power level. Suitable long-term quality parameters include error rates such as bit error rate (BER) and packet error rate (PER).
- SINR signal-to-interference and noise ratio
- SNR signal-to-noise ratio
- Suitable long-term quality parameters include error rates such as bit error rate (BER) and packet error rate (PER).
- the first-order and second-order statistics are derived from a short-term quality parameter such as the SINR.
- statistics of both a short-term and a long-term quality parameter are used.
- the short-term quality parameter used is SINR.
- Statistics computation block 102 computes a first-order statistical parameter 104 and a second-order statistical parameter 106 of SINR.
- first-order statistical parameter 104 is mean SINR and second-order statistical parameter is a variance SINR.
- Variance 106 of SINR actually consists of two values, SINR temporal variance 106 A and SINR frequency variance 106 B. In systems which do not employ multi-carrier transmission schemes frequency variance 106 B does not have to be computed. It should be noted that each data stream of k streams will have an associated statistical parameter 104 , 106 A, 106 B.
- a window adjustment 108 such as a timing circuit is connected to statistics computation block 102 .
- Window adjustment 108 sets a first time interval or first sampling window ⁇ 1 (see FIG. 5) during which the SINR is sampled.
- SINR is sampled during training tones T occurring during sampling window ⁇ 1 .
- the present embodiment uses multiple carrier frequencies f c and thus the SINR is sampled and computed by block 102 for data 52 transmitted at each of the n carrier frequencies f c .
- ⁇ 1 statistics computation block 102 constructs the following matrix: ⁇ [ SINR 1 , 1 SINR 1 , 2 ... SINR 1 , w SINR 2 , 1 ... ... SINR n , 1 SINR n , w ]
- SINR i,j is the SINR at the i-th carrier frequency f ci during training phase j. There are thus 1 to n carrier frequencies f c and 1 to w training phases.
- first sampling window ⁇ 1 takes into account general parameters of the communication system and/or channel 22 .
- channel 22 has a coherence time during which the condition of channel 22 is stable.
- window adjustment 108 sets first sampling window ⁇ 1 based on the coherence time.
- first sampling window ⁇ 1 can be set on the order of or shorter than the coherence time.
- the first- and second-order statistical parameters 104 , 106 A, 106 B computed during time window ⁇ 1 are minimally affected by loss of coherence.
- window adjustment 108 sets first sampling window ⁇ 1 to be much larger than the coherence time.
- window adjustment 108 sets first sampling window ⁇ 1 on the order of or equal to a link update time or a delay time. This is the amount of time required for receive unit 90 to communicate to transmit unit 50 the SINR statistics and/or the appropriate mode selection based on these SINR statistics as explained below.
- the delay time is a design parameter limited by the complexity of computations involved and feedback from receive unit 90 to transmit unit 50 .
- the delay time of the system should preferably be less or significantly less than the channel coherence time when the window size ⁇ 1 is chosen smaller than the coherence time.
- the window size ⁇ 1 should also be chosen appropriately to be larger than the channel coherence time.
- first-order and second-order statistics of the short-term quality parameter in the present case mean and variance of SINR could be sampled and computed over different sampling windows.
- SINR frequency variance 106 A and SINR time variance 106 B require a variance computation time.
- Variance computation time is chosen as the minimum amount of time required to obtain an accurate value of variances 106 A, 106 B.
- Window adjustment 108 therefore sets first sampling window ⁇ 1 ′ on the order of or equal to the variance computation time, the embodiment illustrated in FIG. 5 shows ⁇ 1 and ⁇ 1 ′ to be equal.
- receive unit 90 also computes a long-term quality parameter, in this embodiment an error rate of data 52 .
- receive unit 90 computes a bit error rate (BER) or a packet error rate (PER) of data 52 . It typically takes a much longer period of time than the length of first sampling windows ⁇ 1 , ⁇ 1 ′ to compute these error rates. Conveniently, these error rates are thus computed during second sampling window ⁇ 2 or over an error rate computation time (see FIG. 5 ). The computation of these error values and circuits necessary to perform these computations are well known in the art.
- BER bit error rate
- PER packet error rate
- long-term quality parameters can be sampled over two second sampling window lengths as well.
- mean BER is computed during second time window ⁇ 2 .
- long-term quality parameter computed is the packet error rate (PER).
- PER packet error rate
- the packet error rate can be computed by keeping track of the cyclic redundancy check (CRC)failures on the received packets.
- CRC cyclic redundancy check
- PER computation is a well-known technique and is performed in this embodiment by a PER statistics circuit 110 . The PER computation can be used to further improve mode selection.
- the first and second-order statistical parameters of the short term quality parameter 104 , 106 A, 106 B are delivered from statistics computation block 102 to a mode selection block 112 .
- the first-order statistical parameter of the long-term quality parameter in this embodiment the mean PER is also delivered to block 112 .
- the PER statistics circuit 110 is also connected to mode selection block 112 and delivers the PER statistics to it.
- Mode selection block is connected to a database 114 , conveniently containing the same set of modes as database 78 of transmit unit 50 .
- the set of modes in database 114 is related to first-order statistical parameter 104 and second-order statistical parameters 106 A, 106 B of short-term quality parameter.
- Block 112 selects the subsequent mode number for encoding data 52 .
- Block 112 is connected to a feedback block 116 and a corresponding transmitter 118 for transmission of the feedback to transmit unit 50 .
- a mode selection is made for each of the k streams.
- a mode index indicating the mode to be used for each of the k streams is fed back to transmit unit 50 .
- transmit unit 50 receives feedback from receive unit 90 via a feedback extractor 80 .
- Feedback extractor 80 detects the mode index or any other designation of the selected modes for each of the k streams and forwards this information to controller 66 .
- Controller 66 looks up the mode by mode index in database 78 and thus determines the modulation, coding rate and any other parameters to be used for each of the k streams.
- TDD time-division duplexing
- transmit processing block 56 when the system of invention is placed into operation, transmit processing block 56 first assigns an initial mode, e.g., one of the modes available in the set of modes stored in database 78 to each of the k streams.
- the choice of initial modes can be made on previously known data, simulations or empirical results.
- Transmit unit 50 then transmits data 52 in the form of transmit signals TS to receive unit 90 .
- Receive unit 90 receives receive signals RS, reconstructs data 52 therefrom, and computes first-order and second-order statistical parameters 104 , 106 A, 106 B of short-term quality parameter.
- Mode selection block 112 selects from database 114 the subsequent mode based on parameters 104 , 106 A, 106 B.
- Lookup tables 2 and C illustrate a portion of database of 114 arranged to conveniently determine the mode number of a subsequent mode to be used in encoding data 52 based on the frequency and temporal variances of SINR (second-order statistical parameter of short-term quality parameter) and mean SINR (first-order statistical of short-term quality parameter).
- Table 2 is referenced to additional tables A, B, C and D (only table C shown) based on frequency and temporal variances 106 A, 106 B of SINR.
- the third entry in Table 2 corresponds to table C where modes are ordered by mean SINR (first-order statistical parameter of short-term quality parameter).
- a subsequent mode to be applied in encoding data 52 can be easily obtained from database 114 by block 112 based on its mode number.
- block 112 can obtain at least one long-term quality parameter and its statistics, i.e., first-order statistical parameter or mean PER in this embodiment.
- Block 112 uses mean PER to find adjustment value ⁇ that is added to the mean SINR value.
- the mean SINR value used to look up the corresponding mode is now mean SINR+ ⁇ .
- subsequent mode selection is altered or adjusted by taking into account the long-term quality parameter.
- mode selection block 112 determines which modes should be used for each of the k streams, these subsequent modes are fed back to transmit unit 50 and applied to the k streams. This operation repeats itself, and each new selection of subsequent modes is fed back to transmit unit 50 to thus account for the changing conditions of channel 22 .
- any combination of short-term and long-term quality parameters and their first- and second-order statistics can be used to thus appropriately select modes which should be used in transmitting data 52 .
- the quality parameters can further be related to link quality parameters or communication parameters such as BER, PER, data capacity, signal quality, spectral efficiency or throughput and any other parameters to support requisite user services.(e.g., voice communication). It should be noted, that BER and PER are both quality parameters and communication parameters. The subsequent mode selection can be made to optimize any of these communication parameters.
- the use of at least two statistical parameters provides improved channel characterization leading to better selection of a subsequent mode than in prior art systems. Adapting the timing window to the mode update delay further improves mode selection. Furthermore, the use of long-term statistical parameters in mode selection further refines subsequent mode selection over longer time periods.
Abstract
Description
TABLE 1 | |||||
Modulation Rate | Throughput | ||||
Mode | (bits/symbol) | Coding Rate | (bits/s/Hz) | ||
1 | 2 | 3/4 | 3/2 | ||
2 | 2 | 2/3 | 4/3 | ||
3 | 2 | 1/2 | 1 | ||
4 | 2 | 1/3 | 2/3 | ||
5 | 4 | 3/4 | 3 | ||
6 | 4 | 2/3 | 8/3 | ||
7 | 4 | 1/2 | 2 | ||
8 | 4 | 1/3 | 4/3 | ||
9 | 5 | 3/4 | 15/4 | ||
10 | 5 | 2/3 | 10/3 | ||
11 | 5 | 1/2 | 5/2 | ||
12 | 5 | 1/3 | 5/3 | ||
13 | 6 | 3/4 | 9/2 | ||
14 | 6 | 2/3 | 4 | ||
15 | 6 | 1/2 | 3 | ||
16 | 6 | 1/3 | 2 | ||
TABLE 2 | ||
SINR variance | SINR variance | |
(frequency) | (temporal) | Table |
A | ||
B | ||
C | ||
D | ||
TABLE C | |||
SINR mean | Mode No. | ||
40 dB | |||
35 dB | |||
25 |
|||
10 dB | |||
Claims (61)
Priority Applications (10)
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AU2001291131A AU2001291131A1 (en) | 2000-09-19 | 2001-09-19 | Mode selection for data transmission in wireless communication channels based on statistical parameters |
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US10/072,359 US6802035B2 (en) | 2000-09-19 | 2002-04-01 | System and method of dynamically optimizing a transmission mode of wirelessly transmitted information |
US10/884,102 US7761775B2 (en) | 2000-09-19 | 2004-07-01 | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US10/990,676 US7583609B2 (en) | 2000-09-19 | 2004-11-16 | System and method of dynamically optimizing a transmission mode of wirelessly transmitted information |
US12/491,634 US7920483B2 (en) | 2000-09-19 | 2009-06-25 | System and method of dynamically optimizing a transmission mode of wirelessly transmitted information |
US12/823,267 US7921349B2 (en) | 2000-09-19 | 2010-06-25 | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US13/076,999 US8418033B2 (en) | 2000-09-19 | 2011-03-31 | Mode selection for data transmission in wireless communication channels based on statistical parameters |
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Cited By (127)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020105925A1 (en) * | 2001-01-16 | 2002-08-08 | Shoemake Matthew B. | Jointly controlling transmission rate and power in a communications system |
US20020126764A1 (en) * | 2000-10-20 | 2002-09-12 | Matsushita Electric Industrial Co., Ltd. | Radio communication apparatus |
US20020154611A1 (en) * | 2001-02-27 | 2002-10-24 | Anders Khullar | Method, apparatus, and system for optimizing transmission power and bit rate in multi-transmission scheme communication systems |
US20020172212A1 (en) * | 2001-03-27 | 2002-11-21 | Erving Richard H. | Method and system for increasing data throughput in communications channels on an opportunistic basis |
US20020193146A1 (en) * | 2001-06-06 | 2002-12-19 | Mark Wallace | Method and apparatus for antenna diversity in a wireless communication system |
US20030064729A1 (en) * | 2001-08-27 | 2003-04-03 | Atsushi Yamashita | Mobile communication system, and a radio base station, a radio apparatus and a mobile terminal |
US20030076797A1 (en) * | 2001-10-18 | 2003-04-24 | Angel Lozano | Rate control technique for layered architectures with multiple transmit and receive antennas |
US20030086371A1 (en) * | 2001-11-02 | 2003-05-08 | Walton Jay R | Adaptive rate control for OFDM communication system |
US20030087671A1 (en) * | 2001-11-02 | 2003-05-08 | Nokia Corporation | Multi-mode I/O circuitry supporting low interference signaling schemes for high speed digital interfaces |
US20030167306A1 (en) * | 2002-03-04 | 2003-09-04 | Diego Kaplan | System and method for optimal short message service (SMS) encoding in a wireless communications device |
US20030185241A1 (en) * | 2002-04-01 | 2003-10-02 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US20040004998A1 (en) * | 2002-02-25 | 2004-01-08 | Kabushiki Kaisha Toshiba | Adaptive modulation for wireless networks |
US20040027994A1 (en) * | 2002-08-06 | 2004-02-12 | Baines Steven John | Method of controlling a communications link |
US20040047425A1 (en) * | 2001-08-28 | 2004-03-11 | Katsutoshi Itoh | Transmission apparatus, transmission control method, reception apparatus, and reception control method |
US20040054947A1 (en) * | 2002-09-18 | 2004-03-18 | Godfrey Timothy Gordon | Adaptive transmission rate and fragmentation threshold mechanism for local area networks |
US20040081131A1 (en) * | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US20040203961A1 (en) * | 2002-04-11 | 2004-10-14 | Sined S.R.L. | Method and apparatus for remote transmission of data, information and instructions between remote patients and specialized personnel |
US20040208145A1 (en) * | 2002-06-20 | 2004-10-21 | Lg Electronics Inc. | MIMO system and method for radio communication |
US20040242162A1 (en) * | 2003-05-28 | 2004-12-02 | Lau Kin Nang | Method of transmitting or receiving with constrained feedback information |
US20050022097A1 (en) * | 2003-07-22 | 2005-01-27 | Jung-Fu Cheng | Adaptive hybrid ARQ algorithms |
US20050031044A1 (en) * | 2000-09-19 | 2005-02-10 | Gesbert David J. | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US20050152387A1 (en) * | 2004-01-09 | 2005-07-14 | Yoriko Utsunomiya | Communication method, communication apparatus, and communication system |
US20050160181A1 (en) * | 2004-01-15 | 2005-07-21 | Samsung Electronics Co., Ltd. | Method of communications between MIMO stations |
US20050249157A1 (en) * | 2004-05-07 | 2005-11-10 | Lu Qian | Data rate shifting methods and techniques |
US20050283705A1 (en) * | 2004-06-18 | 2005-12-22 | Kabushiki Kaisha Toshiba | Bit interleaver for a MIMO system |
US20060029157A1 (en) * | 2004-08-09 | 2006-02-09 | Texas Instruments Incorporated | Wireless precoding methods |
US20060056501A1 (en) * | 2003-01-24 | 2006-03-16 | Kenichiro Shinoi | Line quality report accuracy measurement device and accuracy measurement method |
US20060084400A1 (en) * | 2004-10-15 | 2006-04-20 | Nokia Corporation | Simplified practical rank and mechanism, and associated method, to adapt MIMO modulation in a multi-carrier system with feedback |
US20060083195A1 (en) * | 2004-09-07 | 2006-04-20 | Samsung Electronics Co., Ltd. | MIMO communication system using an adaptive transmission mode switching technique |
US20060087998A1 (en) * | 2003-06-18 | 2006-04-27 | Nippon Telegraph And Telephone Corp. | Radio packet communication method |
WO2006039098A3 (en) * | 2004-09-30 | 2006-06-08 | Motorola Inc | A method for the selection of forward error correction (fec)/ constellation pairings for digital transmitted segments based on learning radio link adaptation (rla) |
US20060133622A1 (en) * | 2004-12-22 | 2006-06-22 | Broadcom Corporation | Wireless telephone with adaptive microphone array |
US20060160495A1 (en) * | 2005-01-14 | 2006-07-20 | Peter Strong | Dual payload and adaptive modulation |
EP1699177A1 (en) * | 2005-03-03 | 2006-09-06 | Texas Instruments Limited | Link adaptation for high throughput multiple antenna WLAN system |
US20060205357A1 (en) * | 2005-03-11 | 2006-09-14 | Byoung-Hoon Kim | Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates |
US20060223514A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Signal enhancement through diversity |
US20060222020A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Time start in the forward path |
US20060222087A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Methods and systems for handling underflow and overflow in a software defined radio |
US20060222054A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Dynamic frequency hopping |
US20060227736A1 (en) * | 2005-03-31 | 2006-10-12 | Adc Telecommunications, Inc. | Dynamic reallocation of bandwidth and modulation protocols |
US20060227805A1 (en) * | 2005-03-31 | 2006-10-12 | Adc Telecommunications, Inc. | Buffers handling multiple protocols |
US20070049295A1 (en) * | 2005-08-24 | 2007-03-01 | Soliman Samir S | Method and apparatus for classifying user morphology for efficient use of cell phone system resources |
WO2007052983A1 (en) * | 2005-11-04 | 2007-05-10 | Samsung Electronics Co., Ltd. | Method and system for providing adaptive modulation and coding in a multi-carrier wireless network |
US20070116300A1 (en) * | 2004-12-22 | 2007-05-24 | Broadcom Corporation | Channel decoding for wireless telephones with multiple microphones and multiple description transmission |
US20070211822A1 (en) * | 2006-01-11 | 2007-09-13 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
US20070223367A1 (en) * | 2004-04-30 | 2007-09-27 | Koninklijke Philips Electronics, N.V. | Adaptive Mimo Wireless Communicationsi System |
US7277679B1 (en) * | 2001-09-28 | 2007-10-02 | Arraycomm, Llc | Method and apparatus to provide multiple-mode spatial processing to a terminal unit |
US7301924B1 (en) * | 2002-07-15 | 2007-11-27 | Cisco Technology, Inc. | Media access control for MIMO wireless network |
US20070275665A1 (en) * | 2006-05-23 | 2007-11-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for generating channel quality information for wireless communication |
US20070274411A1 (en) * | 2006-05-26 | 2007-11-29 | Lg Electronics Inc. | Signal generation using phase-shift based pre-coding |
US20070280373A1 (en) * | 2006-05-26 | 2007-12-06 | Lg Electronics Inc. | Phase shift based precoding method and transceiver for supporting the same |
US20080069038A1 (en) * | 2006-08-29 | 2008-03-20 | Atsushi Yamamoto | MIMO antenna apparatus controlling number of streams and modulation and demodulation method |
US20080089442A1 (en) * | 2006-09-19 | 2008-04-17 | Lg Electronics Inc. | method of performing phase shift-based precoding and an apparatus for supporting the same in a wireless communication system |
US20080101458A1 (en) * | 2006-11-01 | 2008-05-01 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless communications |
US20080161001A1 (en) * | 2001-12-07 | 2008-07-03 | Qualcomm Incorporated | Method and apparatus for effecting handoff between different cellular communications systems |
US20080168199A1 (en) * | 2005-03-31 | 2008-07-10 | Adc Telecommunications, Inc. | Dynamic readjustment of power |
US20080198946A1 (en) * | 2007-02-14 | 2008-08-21 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20080205533A1 (en) * | 2006-09-19 | 2008-08-28 | Lg Electronics Inc. | Method of transmitting using phase shift-based precoding and apparatus for implementing the same in a wireless communication system |
US20080219363A1 (en) * | 2000-12-15 | 2008-09-11 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US20080240050A1 (en) * | 2007-03-28 | 2008-10-02 | Harris Corporation, Corporation The The State Of Delaware | Tdma mobile ad-hoc network (manet) with second order timing and tracking |
US20080254784A1 (en) * | 2005-03-31 | 2008-10-16 | Adc Telecommunications, Inc. | Dynamic reconfiguration of resources through page headers |
US20080285453A1 (en) * | 2007-05-18 | 2008-11-20 | International Business Machines Corporation | Method for monitoring ber in an infiniband environment |
US20080285443A1 (en) * | 2007-05-18 | 2008-11-20 | International Business Machines Corporation | Method for monitoring channel eye characteristics in a high-speed serdes data link |
US20080310390A1 (en) * | 2007-06-14 | 2008-12-18 | Harris Corporation | Tdma communications system with configuration beacon and associated method |
US20090111507A1 (en) * | 2007-10-30 | 2009-04-30 | Broadcom Corporation | Speech intelligibility in telephones with multiple microphones |
US20090209290A1 (en) * | 2004-12-22 | 2009-08-20 | Broadcom Corporation | Wireless Telephone Having Multiple Microphones |
US20090262850A1 (en) * | 2000-09-19 | 2009-10-22 | Severine Catreux | System and Method of Dynamically Optimizing a Transmission Mode of Wirelessly Transmitted Information |
US20090279498A1 (en) * | 2000-12-15 | 2009-11-12 | Adaptix, Inc. | Multi-carrier communications with group-based subcarrier allocation |
KR100934657B1 (en) | 2006-05-26 | 2009-12-31 | 엘지전자 주식회사 | Phase shift based precoding method and transceiver |
US20100055708A1 (en) * | 2008-08-26 | 2010-03-04 | Becton, Dickinson And Company | Assay for Chlamydia trachomatis by amplification and detection of Chlamydia trachomatis cytotoxin gene |
US20100067401A1 (en) * | 2008-09-16 | 2010-03-18 | Qualcomm Incorporated | Methods and systems for transmission mode selection in a multi channel communication system |
US20100202500A1 (en) * | 2007-09-19 | 2010-08-12 | Bin Chul Ihm | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US20110222504A1 (en) * | 2004-06-24 | 2011-09-15 | Nortel Networks Limited | Preambles in ofdma system |
EP2385643A1 (en) * | 2010-05-03 | 2011-11-09 | Alcatel Lucent | A method for selection of a modulation and coding scheme, and a device therefor |
US20120008517A1 (en) * | 2005-08-19 | 2012-01-12 | Panasonic Corporation | Communication apparatus and communication method |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8145179B2 (en) | 2002-10-25 | 2012-03-27 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
US8203978B2 (en) | 2002-10-25 | 2012-06-19 | Qualcomm Incorporated | Multi-mode terminal in a wireless MIMO system |
US8208364B2 (en) | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8218609B2 (en) * | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US8358714B2 (en) | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
US20130114444A1 (en) * | 2006-01-20 | 2013-05-09 | Research In Motion Limited | Methods and Systems for Scheduling in a Virtual MIMO Communication Environment |
US8509703B2 (en) * | 2004-12-22 | 2013-08-13 | Broadcom Corporation | Wireless telephone with multiple microphones and multiple description transmission |
US8539119B2 (en) | 2004-11-24 | 2013-09-17 | Qualcomm Incorporated | Methods and apparatus for exchanging messages having a digital data interface device message format |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8606946B2 (en) | 2003-11-12 | 2013-12-10 | Qualcomm Incorporated | Method, system and computer program for driving a data signal in data interface communication data link |
US8611215B2 (en) | 2005-11-23 | 2013-12-17 | Qualcomm Incorporated | Systems and methods for digital data transmission rate control |
US8625625B2 (en) | 2004-03-10 | 2014-01-07 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8630318B2 (en) | 2004-06-04 | 2014-01-14 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8635358B2 (en) | 2003-09-10 | 2014-01-21 | Qualcomm Incorporated | High data rate interface |
US8645566B2 (en) | 2004-03-24 | 2014-02-04 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8650304B2 (en) | 2004-06-04 | 2014-02-11 | Qualcomm Incorporated | Determining a pre skew and post skew calibration data rate in a mobile display digital interface (MDDI) communication system |
US8667363B2 (en) | 2004-11-24 | 2014-03-04 | Qualcomm Incorporated | Systems and methods for implementing cyclic redundancy checks |
US8670457B2 (en) | 2003-12-08 | 2014-03-11 | Qualcomm Incorporated | High data rate interface with improved link synchronization |
US8687658B2 (en) | 2003-11-25 | 2014-04-01 | Qualcomm Incorporated | High data rate interface with improved link synchronization |
US20140095755A1 (en) * | 2012-09-28 | 2014-04-03 | Jie Gao | Using adaptive channel selection to enhance the performance of wireless docking |
US8694663B2 (en) | 2001-09-06 | 2014-04-08 | Qualcomm Incorporated | System for transferring digital data at a high rate between a host and a client over a communication path for presentation to a user |
US8694652B2 (en) | 2003-10-15 | 2014-04-08 | Qualcomm Incorporated | Method, system and computer program for adding a field to a client capability packet sent from a client to a host |
US8692838B2 (en) | 2004-11-24 | 2014-04-08 | Qualcomm Incorporated | Methods and systems for updating a buffer |
US8692839B2 (en) | 2005-11-23 | 2014-04-08 | Qualcomm Incorporated | Methods and systems for updating a buffer |
US8700744B2 (en) | 2003-06-02 | 2014-04-15 | Qualcomm Incorporated | Generating and implementing a signal protocol and interface for higher data rates |
US8705521B2 (en) | 2004-03-17 | 2014-04-22 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8705571B2 (en) | 2003-08-13 | 2014-04-22 | Qualcomm Incorporated | Signal interface for higher data rates |
US8711763B2 (en) | 2002-10-25 | 2014-04-29 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8723705B2 (en) | 2004-11-24 | 2014-05-13 | Qualcomm Incorporated | Low output skew double data rate serial encoder |
US8730069B2 (en) | 2005-11-23 | 2014-05-20 | Qualcomm Incorporated | Double data rate serial encoder |
US8745251B2 (en) | 2000-12-15 | 2014-06-03 | Qualcomm Incorporated | Power reduction system for an apparatus for high data rate signal transfer using a communication protocol |
US8756294B2 (en) | 2003-10-29 | 2014-06-17 | Qualcomm Incorporated | High data rate interface |
US8760992B2 (en) | 2004-12-07 | 2014-06-24 | Adaptix, Inc. | Method and system for switching antenna and channel assignments in broadband wireless networks |
US8855226B2 (en) | 2005-05-12 | 2014-10-07 | Qualcomm Incorporated | Rate selection with margin sharing |
US8861499B1 (en) * | 2003-02-14 | 2014-10-14 | Marvell International Ltd. | Data rate adaptation in multiple-in-multiple-out systems |
US8873365B2 (en) | 2002-10-25 | 2014-10-28 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US8873584B2 (en) | 2004-11-24 | 2014-10-28 | Qualcomm Incorporated | Digital data interface device |
US8890744B1 (en) | 1999-04-07 | 2014-11-18 | James L. Geer | Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns |
US20150201052A1 (en) * | 2014-01-15 | 2015-07-16 | Qualcomm Incorporated | Analog behavior modeling for 3-phase signaling |
US9178584B2 (en) | 2005-03-11 | 2015-11-03 | Qualcomm Incorporated | System and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates |
US9271192B1 (en) | 2003-08-12 | 2016-02-23 | Marvell International Ltd. | Rate adaptation in wireless systems |
US20160072648A1 (en) * | 2013-05-17 | 2016-03-10 | Peter Strong | Adaptive modulation |
US9369914B1 (en) | 2004-03-11 | 2016-06-14 | Marvell International Ltd. | Adaptively determining a data rate of packetized information transmission over a wireless channel |
US20160226740A1 (en) * | 2013-09-27 | 2016-08-04 | Thomson Licensing | Method for testing a wireless link of a wi-fi node, and circuit performing the method |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US9780987B2 (en) * | 2000-09-01 | 2017-10-03 | Apple Inc. | Adaptive time diversity and spatial diversity for OFDM |
US10038483B2 (en) | 2010-12-10 | 2018-07-31 | Sun Patent Trust | Signal generation method and signal generation device |
US10250309B2 (en) | 2016-03-24 | 2019-04-02 | Huawei Technologies, Co., Ltd. | System and method for downlink channel estimation in massive multiple-input-multiple-output (MIMO) |
Families Citing this family (108)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6850498B2 (en) * | 2000-12-22 | 2005-02-01 | Intel Corporation | Method and system for evaluating a wireless link |
US20020132642A1 (en) * | 2001-03-16 | 2002-09-19 | Hines John Ned | Common module combiner/active array multicarrier approach without linearization loops |
FI20010779A (en) * | 2001-04-12 | 2002-10-13 | Nokia Corp | Procedure for increasing data transfer rate as well as receiver, transmitter and terminal |
US7889759B2 (en) * | 2001-05-04 | 2011-02-15 | Entropic Communications, Inc. | Broadband cable network utilizing common bit-loading |
US7688899B2 (en) * | 2001-05-17 | 2010-03-30 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
US7072413B2 (en) * | 2001-05-17 | 2006-07-04 | Qualcomm, Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
KR100703295B1 (en) * | 2001-08-18 | 2007-04-03 | 삼성전자주식회사 | Method and apparatus for transporting and receiving data using antenna array in mobile system |
GB2382748A (en) | 2001-11-28 | 2003-06-04 | Ipwireless Inc | Signal to noise plus interference ratio (SNIR) estimation with corection factor |
US6754169B2 (en) * | 2001-12-13 | 2004-06-22 | Motorola, Inc. | Method and system of operation for a variable transmission mode multi-carrier communication system |
JP2003218778A (en) * | 2002-01-24 | 2003-07-31 | Nec Corp | Radio transmitting/receiving device and radio communication system |
US20030162519A1 (en) * | 2002-02-26 | 2003-08-28 | Martin Smith | Radio communications device |
US7327800B2 (en) | 2002-05-24 | 2008-02-05 | Vecima Networks Inc. | System and method for data detection in wireless communication systems |
TW200735568A (en) * | 2002-11-08 | 2007-09-16 | Interdigital Tech Corp | Composite channel quality estimation techniques for wireless receivers |
US7006810B1 (en) | 2002-12-19 | 2006-02-28 | At&T Corp. | Method of selecting receive antennas for MIMO systems |
KR100461542B1 (en) * | 2002-12-26 | 2004-12-17 | 한국전자통신연구원 | Apparatus and Method for Digital Broadcasting Service using Multiple Frequency Bands |
KR100501937B1 (en) * | 2003-05-03 | 2005-07-18 | 삼성전자주식회사 | Ultra wideband transceiver and method thereof |
US7885228B2 (en) * | 2003-03-20 | 2011-02-08 | Qualcomm Incorporated | Transmission mode selection for data transmission in a multi-channel communication system |
US7327795B2 (en) | 2003-03-31 | 2008-02-05 | Vecima Networks Inc. | System and method for wireless communication systems |
CN100452688C (en) * | 2003-06-27 | 2009-01-14 | 上海贝尔阿尔卡特股份有限公司 | Self-adaptive modulating and coding method and device based on channel information second order statistics |
GB2404539B (en) * | 2003-07-31 | 2006-06-14 | Fujitsu Ltd | Adaptive modulation and coding |
US7616698B2 (en) | 2003-11-04 | 2009-11-10 | Atheros Communications, Inc. | Multiple-input multiple output system and method |
KR100946923B1 (en) | 2004-03-12 | 2010-03-09 | 삼성전자주식회사 | Method and apparatus for transmitting/receiving channel quality information in a communication system using orthogonal frequency division multiplexing scheme, and system thereof |
GB2413466B (en) * | 2004-04-23 | 2006-03-15 | Toshiba Res Europ Ltd | Data transmission in a wireless network |
US20060080419A1 (en) * | 2004-05-21 | 2006-04-13 | Bea Systems, Inc. | Reliable updating for a service oriented architecture |
US20050273521A1 (en) * | 2004-05-21 | 2005-12-08 | Bea Systems, Inc. | Dynamically configurable service oriented architecture |
US20050267892A1 (en) * | 2004-05-21 | 2005-12-01 | Patrick Paul B | Service proxy definition |
US7653008B2 (en) | 2004-05-21 | 2010-01-26 | Bea Systems, Inc. | Dynamically configurable service oriented architecture |
US20050273517A1 (en) * | 2004-05-21 | 2005-12-08 | Bea Systems, Inc. | Service oriented architecture with credential management |
US20050273520A1 (en) * | 2004-05-21 | 2005-12-08 | Bea Systems, Inc. | Service oriented architecture with file transport protocol |
JP4526883B2 (en) * | 2004-06-28 | 2010-08-18 | 株式会社エヌ・ティ・ティ・ドコモ | Transceiver and method using multiple antennas |
US7499393B2 (en) * | 2004-08-11 | 2009-03-03 | Interdigital Technology Corporation | Per stream rate control (PSRC) for improving system efficiency in OFDM-MIMO communication systems |
KR100586886B1 (en) | 2004-08-13 | 2006-06-08 | 삼성전자주식회사 | Method and apparatus for wireless local area network communication |
DE602005007135D1 (en) * | 2004-09-07 | 2008-07-10 | Samsung Electronics Co Ltd | MIMO system with adaptive switching of the transmission scheme |
FR2875658B1 (en) * | 2004-09-21 | 2007-03-02 | Commissariat Energie Atomique | ESTIMATING THE MOST NOISE INTERFERENCE SIGNAL RATIO AT THE OUTPUT OF AN OFDM-CDMA RECEIVER. |
US20060098761A1 (en) * | 2004-11-10 | 2006-05-11 | Motorola, Inc. | Multi-mode transmitter |
DE602004022438D1 (en) * | 2004-12-20 | 2009-09-17 | Mitsubishi Electric Corp | Method for determining a metric for assessing the transmission quality of a data frame |
WO2006076787A1 (en) | 2005-01-19 | 2006-07-27 | Nortel Networks Limited | Method and system for retransmitting data packets |
US20060234762A1 (en) * | 2005-04-01 | 2006-10-19 | Interdigital Technology Corporation | Method and apparatus for selecting a communication mode for performing user requested data transfers |
WO2006106378A1 (en) | 2005-04-07 | 2006-10-12 | Nokia Corporation | A terminal having a variable duplex capability |
US7587660B2 (en) * | 2005-04-22 | 2009-09-08 | Kansas State University Research Foundation | Multiple-access code generation |
US7352795B2 (en) * | 2005-05-04 | 2008-04-01 | Harris Corporation | System and method for communicating data using constant amplitude waveform with hybrid orthogonal and MSK or GMSK modulation |
CN1694442A (en) | 2005-05-13 | 2005-11-09 | 东南大学 | Generalized multi-carrier radio transmission scheme for supporting multi-antenna transmission |
US8971461B2 (en) * | 2005-06-01 | 2015-03-03 | Qualcomm Incorporated | CQI and rank prediction for list sphere decoding and ML MIMO receivers |
CN101204100B (en) | 2005-06-15 | 2011-01-05 | 华为技术有限公司 | Method and system for communication resource distribution |
US8073068B2 (en) * | 2005-08-22 | 2011-12-06 | Qualcomm Incorporated | Selective virtual antenna transmission |
US20070041457A1 (en) | 2005-08-22 | 2007-02-22 | Tamer Kadous | Method and apparatus for providing antenna diversity in a wireless communication system |
KR101119281B1 (en) | 2005-08-29 | 2012-03-15 | 삼성전자주식회사 | Apparatus and method of feedback channel quality information and scheduling apparatus and method using thereof in a wireless communication system |
DE102005043001B4 (en) * | 2005-09-09 | 2014-06-05 | Intel Mobile Communications GmbH | Method for transmitting a plurality of data streams, method for demultiplexing transmitted data streams received by means of a plurality of receiving antennas, transmitting device for transmitting a plurality of data streams, receiving device for demultiplexing transmitted data streams received by a plurality of receiving antennas, and computer program elements |
CN101283526B (en) * | 2005-10-07 | 2015-09-09 | 日本电气株式会社 | The mimo wireless communication system that travelling carriage and multiple base station use and method |
KR100834668B1 (en) * | 2005-11-04 | 2008-06-02 | 삼성전자주식회사 | Apparatus and method for scheduling in a communication system |
WO2007069830A2 (en) * | 2005-12-13 | 2007-06-21 | Electronics And Telecommunications Research Institute | Transmitting apparatus and transmitting method of base station, and receiving apparatus and communication method of ue in mobile communication system |
EP1838024A1 (en) * | 2006-03-20 | 2007-09-26 | Siemens Aktiengesellschaft | Method and apparatus for selection of MIMO configuration and coding in a mobile telecommunications system |
US9130791B2 (en) | 2006-03-20 | 2015-09-08 | Qualcomm Incorporated | Uplink channel estimation using a signaling channel |
US8014455B2 (en) * | 2006-03-27 | 2011-09-06 | Qualcomm Incorporated | Feedback of differentially encoded channel state information for multiple-input multiple-output (MIMO) and subband scheduling in a wireless communication system |
KR101231357B1 (en) * | 2006-04-06 | 2013-02-07 | 엘지전자 주식회사 | Channel status information feedback method and data transmission method for multiple antenna system |
KR101269201B1 (en) * | 2006-06-30 | 2013-05-28 | 삼성전자주식회사 | Apparatus and method for transmitting/receiving data in a multi-antenna system of closed loop |
US7949064B2 (en) * | 2006-08-14 | 2011-05-24 | Texas Instruments Incorporated | Codebook and pre-coder selection for closed-loop mimo |
JP4295300B2 (en) * | 2006-08-22 | 2009-07-15 | 株式会社エヌ・ティ・ティ・ドコモ | Transmitting apparatus and transmitting method |
KR20090071582A (en) | 2006-09-06 | 2009-07-01 | 콸콤 인코포레이티드 | Codeword permutation and reduced feedback for grouped antennas |
US7864882B2 (en) * | 2006-12-30 | 2011-01-04 | Motorola Mobility, Inc. | Method and apparatus for generating constant envelope modulation using a quadrature transmitter |
US8996394B2 (en) * | 2007-05-18 | 2015-03-31 | Oracle International Corporation | System and method for enabling decision activities in a process management and design environment |
JP4916389B2 (en) * | 2007-06-19 | 2012-04-11 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication control method, base station apparatus, and user apparatus |
US8102765B2 (en) | 2007-06-22 | 2012-01-24 | Microsoft Corporation | Correlation-based rate adaptation for communication networks |
US20090006910A1 (en) * | 2007-06-27 | 2009-01-01 | Belal Hamzeh | Selective hybrid arq |
US8185916B2 (en) | 2007-06-28 | 2012-05-22 | Oracle International Corporation | System and method for integrating a business process management system with an enterprise service bus |
KR100979935B1 (en) * | 2007-07-09 | 2010-09-03 | 삼성전자주식회사 | Apparatus and method for generating effective signal to noise ratio per stream in multiple input multiple output wireless communication system |
JP5141197B2 (en) * | 2007-11-13 | 2013-02-13 | 富士通株式会社 | Encoder |
EP2061167A3 (en) * | 2007-11-19 | 2013-07-31 | Gilat Satellite Networks, Ltd. | Channel estimation for Digital Video Broadcasting via Satellite (DVB-S2) |
US8699960B2 (en) * | 2007-12-21 | 2014-04-15 | Qualcomm Incorporated | Methods and apparatus for channel quality indication feedback in a communication system |
US20110044356A1 (en) * | 2007-12-31 | 2011-02-24 | Runcom Technologies Ltd. | System and method for mode selection based on effective cinr |
US8036168B2 (en) | 2008-01-29 | 2011-10-11 | Motorola Solutions, Inc. | Method and apparatus for link adaptation by stochastically selecting a transmit parameter |
PT2243241E (en) | 2008-02-11 | 2012-07-26 | Ericsson Telefon Ab L M | Link quality estimation method and apparatus in a telecommunication system |
US8155015B2 (en) * | 2008-03-28 | 2012-04-10 | Intel Corporation | Geographical scheduling and association procedure for WiMAX systems |
US8493874B2 (en) * | 2008-05-05 | 2013-07-23 | Motorola Mobility Llc | Method and apparatus for providing channel quality feedback in an orthogonal frequency division multiplexing communication system |
KR20100088554A (en) * | 2009-01-30 | 2010-08-09 | 엘지전자 주식회사 | Method and apparatus of receiving and transmitting signal in wireless communication system |
JP5509474B2 (en) * | 2009-03-16 | 2014-06-04 | マーベル ワールド トレード リミテッド | Feedback and user scheduling for multi-user multi-input multi-output (MU-MIMO) receivers |
US8798120B2 (en) * | 2009-03-18 | 2014-08-05 | The Board Of Regents Of The University Of Texas System | Methods and communication systems having adaptive mode selection |
JP5430738B2 (en) * | 2009-03-30 | 2014-03-05 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | Channel estimation in adaptive modulation systems. |
JP4803281B2 (en) * | 2009-06-03 | 2011-10-26 | カシオ計算機株式会社 | Wireless communication apparatus and program |
US20110090820A1 (en) | 2009-10-16 | 2011-04-21 | Osama Hussein | Self-optimizing wireless network |
FR2953347A1 (en) * | 2009-11-30 | 2011-06-03 | Astrium Sas | TRANSMISSION FORMAT SELECTION METHOD AND THRESHOLD CALIBRATION MODULE FOR SATELLITE TELECOMMUNICATIONS SYSTEM |
CN101765161B (en) * | 2009-12-29 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of chain circuit self-adaptive method and device |
CN101778458B (en) * | 2010-01-05 | 2015-09-16 | 中兴通讯股份有限公司 | A kind of base station energy-saving method and system |
KR101555718B1 (en) * | 2010-02-11 | 2015-09-25 | 삼성전자주식회사 | Method and apparatus for power saving in wireless communication node b |
CN102255702B (en) * | 2010-05-17 | 2014-08-20 | 电信科学技术研究院 | MIMO (Multiple Input Multiple Output) mode switching method and device |
CN102264124B (en) * | 2010-05-28 | 2014-03-05 | 富士通株式会社 | Bit and power distribution method and device as well as communication system |
US8989672B2 (en) * | 2011-01-07 | 2015-03-24 | Apple Inc. | Methods for adjusting radio-frequency circuitry to mitigate interference effects |
WO2013036793A1 (en) | 2011-09-09 | 2013-03-14 | ReVerb Networks, Inc. | Methods and apparatus for implementing a self optimizing-organizing network manager |
US9258719B2 (en) | 2011-11-08 | 2016-02-09 | Viavi Solutions Inc. | Methods and apparatus for partitioning wireless network cells into time-based clusters |
US9008722B2 (en) | 2012-02-17 | 2015-04-14 | ReVerb Networks, Inc. | Methods and apparatus for coordination in multi-mode networks |
TWI474664B (en) * | 2012-11-13 | 2015-02-21 | Ind Tech Res Inst | Method and apparatus for correcting wireless signal quality |
FR3008261B1 (en) * | 2013-07-02 | 2019-08-30 | Thales | METHOD FOR ADAPTING CORRECTING ERROR CODING |
EP3047675A4 (en) | 2013-09-20 | 2017-05-17 | McAfee, Inc. | Optimizing communication for mobile and embedded devices |
GB2539364A (en) * | 2014-10-02 | 2016-12-21 | Aeroscout Ltd | Location system |
US9113353B1 (en) | 2015-02-27 | 2015-08-18 | ReVerb Networks, Inc. | Methods and apparatus for improving coverage and capacity in a wireless network |
CN104734816A (en) * | 2015-04-09 | 2015-06-24 | 五邑大学 | Method for sending antenna constellation diagram in spatial modulation system on basis of convolutional encoding aided design |
US10868596B2 (en) | 2016-04-05 | 2020-12-15 | Apple Inc. | Multiple beam multiple-input-multiple-output system |
US10476628B2 (en) | 2017-11-27 | 2019-11-12 | Comtech Systems Inc. | Adaptive coding and modulation (ACM) transceiver system |
WO2020033160A1 (en) * | 2018-08-08 | 2020-02-13 | Avx Antenna, Inc. D/B/A Ethertronics, Inc. | Methods for configuring a multi-mode antenna system for multi-channel communication systems |
US11063622B2 (en) | 2018-08-08 | 2021-07-13 | Avx Antenna, Inc. | VHF-UHF antenna system with feedback |
US11172455B2 (en) | 2019-07-16 | 2021-11-09 | Microsoft Technology Licensing, Llc | Peak to average power output reduction of RF systems utilizing error correction |
US10911284B1 (en) | 2019-07-16 | 2021-02-02 | Microsoft Technology Licensing, Llc | Intelligent optimization of communication systems utilizing error correction |
US11086719B2 (en) | 2019-07-16 | 2021-08-10 | Microsoft Technology Licensing, Llc | Use of error correction codes to prevent errors in neighboring storage |
US11031961B2 (en) | 2019-07-16 | 2021-06-08 | Microsoft Technology Licensing, Llc | Smart symbol changes for optimization of communications using error correction |
US11063696B2 (en) | 2019-07-16 | 2021-07-13 | Microsoft Technology Licensing, Llc | Increasing average power levels to reduce peak-to-average power levels using error correction codes |
US11075656B2 (en) | 2019-07-16 | 2021-07-27 | Microsoft Technology Licensing, Llc | Bit error reduction of communication systems using error correction |
US11044044B2 (en) | 2019-07-16 | 2021-06-22 | Microsoft Technology Licensing, Llc | Peak to average power ratio reduction of optical systems utilizing error correction |
US10911141B1 (en) | 2019-07-30 | 2021-02-02 | Microsoft Technology Licensing, Llc | Dynamically selecting a channel model for optical communications |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5559810A (en) * | 1994-03-31 | 1996-09-24 | Motorola, Inc. | Communication of data reception history information |
WO1998009381A1 (en) | 1996-08-29 | 1998-03-05 | The Board Of Trustees Of The Leland Stanford Junior University | High capacity wireless communication using spatial subchannels |
US5815488A (en) | 1995-09-28 | 1998-09-29 | Cable Television Laboratories, Inc. | Multiple user access method using OFDM |
US5933421A (en) | 1997-02-06 | 1999-08-03 | At&T Wireless Services Inc. | Method for frequency division duplex communications |
EP0951091A2 (en) | 1998-04-15 | 1999-10-20 | Lucent Technologies Inc. | Wireless communications system having a space-time architecture employing multi-element antennas at both the transmitter and receiver |
US6044485A (en) * | 1997-01-03 | 2000-03-28 | Ericsson Inc. | Transmitter method and transmission system using adaptive coding based on channel characteristics |
US6064662A (en) | 1994-04-28 | 2000-05-16 | At&T Corp | System and method for optimizing spectral efficiency using time-frequency-code slicing |
US6167031A (en) | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
US6175550B1 (en) | 1997-04-01 | 2001-01-16 | Lucent Technologies, Inc. | Orthogonal frequency division multiplexing system with dynamically scalable operating parameters and method thereof |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2240252T3 (en) | 1991-06-11 | 2005-10-16 | Qualcomm Incorporated | VARIABLE SPEED VOCODIFIER. |
US5399365A (en) * | 1991-06-19 | 1995-03-21 | Wm. Wrigley Jr. Company | Chewing gum containing palatinose and/or palatinose oligosaccharide |
US6088590A (en) | 1993-11-01 | 2000-07-11 | Omnipoint Corporation | Method and system for mobile controlled handoff and link maintenance in spread spectrum communication |
US5828677A (en) * | 1996-03-20 | 1998-10-27 | Lucent Technologies Inc. | Adaptive hybrid ARQ coding schemes for slow fading channels in mobile radio systems |
US5699365A (en) | 1996-03-27 | 1997-12-16 | Motorola, Inc. | Apparatus and method for adaptive forward error correction in data communications |
DE19651593B4 (en) * | 1996-12-11 | 2008-11-20 | Rohde & Schwarz Gmbh & Co. Kg | Arrangement for optimizing the data transmission via a bidirectional radio channel |
US6370669B1 (en) * | 1998-01-23 | 2002-04-09 | Hughes Electronics Corporation | Sets of rate-compatible universal turbo codes nearly optimized over various rates and interleaver sizes |
US6154489A (en) * | 1998-03-30 | 2000-11-28 | Motorola, Inc. | Adaptive-rate coded digital image transmission |
JP3741866B2 (en) * | 1998-06-05 | 2006-02-01 | 富士通株式会社 | Adaptive modulation system |
JP3499448B2 (en) | 1998-08-28 | 2004-02-23 | 松下電器産業株式会社 | Wireless communication terminal device and transmission power control method |
US6373823B1 (en) | 1999-01-28 | 2002-04-16 | Qualcomm Incorporated | Method and apparatus for controlling transmission power in a potentially transmission gated or capped communication system |
US6330278B1 (en) * | 1999-07-28 | 2001-12-11 | Integrity Broadband Networks, Inc. | Dynamic adaptive modulation negotiation for point-to-point terrestrial links |
US6366601B1 (en) | 1999-11-17 | 2002-04-02 | Motorola, Inc. | Variable rate spread spectrum communication method and apparatus |
US6640104B1 (en) * | 1999-12-28 | 2003-10-28 | Lucent Technologies Inc. | Dynamic channel assignment for intelligent antennas |
US6473467B1 (en) | 2000-03-22 | 2002-10-29 | Qualcomm Incorporated | Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system |
AU2001249347A1 (en) | 2000-03-22 | 2001-10-03 | Xy2 Attenuators, L.L.C. | Isolating energy conditioning shield assembly |
US6654922B1 (en) | 2000-04-10 | 2003-11-25 | Nokia Corporation | Method and apparatus for declaring correctness of reception of channels for use in a mobile telecommunications system |
US6751199B1 (en) * | 2000-04-24 | 2004-06-15 | Qualcomm Incorporated | Method and apparatus for a rate control in a high data rate communication system |
AU2001255253A1 (en) | 2000-06-30 | 2002-01-14 | Iospan Wireless, Inc. | Method and system for mode adaptation in wireless communication |
US7178089B1 (en) * | 2000-08-23 | 2007-02-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Two stage date packet processing scheme |
US6802035B2 (en) | 2000-09-19 | 2004-10-05 | Intel Corporation | System and method of dynamically optimizing a transmission mode of wirelessly transmitted information |
US6760882B1 (en) | 2000-09-19 | 2004-07-06 | Intel Corporation | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US6947748B2 (en) | 2000-12-15 | 2005-09-20 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US7039038B2 (en) | 2001-01-18 | 2006-05-02 | Texas Instruments Incorporated | Adaptive fragmentation for wireless network communications |
US7406065B2 (en) | 2002-03-14 | 2008-07-29 | Qualcomm, Incorporated | Method and apparatus for reducing inter-channel interference in a wireless communication system |
US20050099968A1 (en) | 2002-06-25 | 2005-05-12 | Osamu Yamano | Power control method and apparatus |
US20050157759A1 (en) | 2002-07-09 | 2005-07-21 | Masahiro Ohno | Communication system, transceiver apparatus and transceiving method |
US7773951B2 (en) * | 2006-05-23 | 2010-08-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for generating channel quality information for wireless communication |
-
2000
- 2000-09-19 US US09/665,149 patent/US6760882B1/en not_active Expired - Lifetime
- 2000-12-05 US US09/730,687 patent/US7191381B2/en not_active Expired - Fee Related
-
2001
- 2001-09-19 WO PCT/US2001/029368 patent/WO2002025853A2/en active Application Filing
- 2001-09-19 AU AU2001291131A patent/AU2001291131A1/en not_active Abandoned
-
2004
- 2004-07-01 US US10/884,102 patent/US7761775B2/en not_active Expired - Fee Related
-
2010
- 2010-06-25 US US12/823,267 patent/US7921349B2/en not_active Expired - Fee Related
-
2011
- 2011-03-31 US US13/076,999 patent/US8418033B2/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5559810A (en) * | 1994-03-31 | 1996-09-24 | Motorola, Inc. | Communication of data reception history information |
US6064662A (en) | 1994-04-28 | 2000-05-16 | At&T Corp | System and method for optimizing spectral efficiency using time-frequency-code slicing |
US5815488A (en) | 1995-09-28 | 1998-09-29 | Cable Television Laboratories, Inc. | Multiple user access method using OFDM |
WO1998009381A1 (en) | 1996-08-29 | 1998-03-05 | The Board Of Trustees Of The Leland Stanford Junior University | High capacity wireless communication using spatial subchannels |
US6144711A (en) | 1996-08-29 | 2000-11-07 | Cisco Systems, Inc. | Spatio-temporal processing for communication |
US6044485A (en) * | 1997-01-03 | 2000-03-28 | Ericsson Inc. | Transmitter method and transmission system using adaptive coding based on channel characteristics |
US5933421A (en) | 1997-02-06 | 1999-08-03 | At&T Wireless Services Inc. | Method for frequency division duplex communications |
US6175550B1 (en) | 1997-04-01 | 2001-01-16 | Lucent Technologies, Inc. | Orthogonal frequency division multiplexing system with dynamically scalable operating parameters and method thereof |
US6167031A (en) | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
EP0951091A2 (en) | 1998-04-15 | 1999-10-20 | Lucent Technologies Inc. | Wireless communications system having a space-time architecture employing multi-element antennas at both the transmitter and receiver |
Non-Patent Citations (1)
Title |
---|
Paulraj, A., Taxonomy of space-time processing for wireless networks, IEE Proc-Radar Sonar Navig., vol. 145, No. 1, Feb. 1998. |
Cited By (319)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8890744B1 (en) | 1999-04-07 | 2014-11-18 | James L. Geer | Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns |
US9551785B1 (en) | 1999-04-07 | 2017-01-24 | James L. Geer | Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns |
US10404515B2 (en) * | 2000-09-01 | 2019-09-03 | Apple Inc. | Adaptive time diversity and spatial diversity for OFDM |
US9780987B2 (en) * | 2000-09-01 | 2017-10-03 | Apple Inc. | Adaptive time diversity and spatial diversity for OFDM |
US20110179336A1 (en) * | 2000-09-19 | 2011-07-21 | Gesbert David J | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US20090262850A1 (en) * | 2000-09-19 | 2009-10-22 | Severine Catreux | System and Method of Dynamically Optimizing a Transmission Mode of Wirelessly Transmitted Information |
US20050031044A1 (en) * | 2000-09-19 | 2005-02-10 | Gesbert David J. | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US7921349B2 (en) | 2000-09-19 | 2011-04-05 | Intel Corporation | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US7920483B2 (en) | 2000-09-19 | 2011-04-05 | Intel Corporation | System and method of dynamically optimizing a transmission mode of wirelessly transmitted information |
US20100318861A1 (en) * | 2000-09-19 | 2010-12-16 | Gesbert David J | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US8418033B2 (en) | 2000-09-19 | 2013-04-09 | Intel Corporation | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US7761775B2 (en) | 2000-09-19 | 2010-07-20 | Intel Corporation | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US7738590B2 (en) | 2000-10-20 | 2010-06-15 | Panasonic Corporation | Radio communication apparatus capable of switching modulation schemes |
US7023933B2 (en) * | 2000-10-20 | 2006-04-04 | Matsushita Electric Industrial Co., Ltd. | Radio communication apparatus |
US20110200086A1 (en) * | 2000-10-20 | 2011-08-18 | Panasonic Corporation | Radio communication apparatus capable of switching modulation schemes |
US20100266059A1 (en) * | 2000-10-20 | 2010-10-21 | Panasonic Corporation | Radio communication apparatus capable of switching modulation schemes |
US9590834B2 (en) | 2000-10-20 | 2017-03-07 | Wi-Fi One, Llc | Radio communication apparatus capable of switching modulation schemes |
US8218680B2 (en) | 2000-10-20 | 2012-07-10 | Panasonic Corporation | Radio communication apparatus capable of switching modulation schemes |
US20020126764A1 (en) * | 2000-10-20 | 2002-09-12 | Matsushita Electric Industrial Co., Ltd. | Radio communication apparatus |
US20060136975A1 (en) * | 2000-10-20 | 2006-06-22 | Matsushita Electric Industrial Co., Ltd. | Radio communication apparatus |
US7953177B2 (en) | 2000-10-20 | 2011-05-31 | Panasonic Corporation | Radio communication apparatus capable of switching modulation schemes |
US8934375B2 (en) | 2000-12-15 | 2015-01-13 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US8958386B2 (en) | 2000-12-15 | 2015-02-17 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US20100238833A1 (en) * | 2000-12-15 | 2010-09-23 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US8891414B2 (en) | 2000-12-15 | 2014-11-18 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US8767702B2 (en) | 2000-12-15 | 2014-07-01 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US20090279498A1 (en) * | 2000-12-15 | 2009-11-12 | Adaptix, Inc. | Multi-carrier communications with group-based subcarrier allocation |
US8750238B2 (en) | 2000-12-15 | 2014-06-10 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US9219572B2 (en) | 2000-12-15 | 2015-12-22 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US9210708B1 (en) | 2000-12-15 | 2015-12-08 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US8036199B2 (en) | 2000-12-15 | 2011-10-11 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US9203553B1 (en) | 2000-12-15 | 2015-12-01 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US7715358B2 (en) | 2000-12-15 | 2010-05-11 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US9191138B2 (en) | 2000-12-15 | 2015-11-17 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US8745251B2 (en) | 2000-12-15 | 2014-06-03 | Qualcomm Incorporated | Power reduction system for an apparatus for high data rate signal transfer using a communication protocol |
US8738020B2 (en) | 2000-12-15 | 2014-05-27 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US8934445B2 (en) | 2000-12-15 | 2015-01-13 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US8743729B2 (en) | 2000-12-15 | 2014-06-03 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US9344211B2 (en) | 2000-12-15 | 2016-05-17 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US20080219363A1 (en) * | 2000-12-15 | 2008-09-11 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US8964719B2 (en) | 2000-12-15 | 2015-02-24 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US7650152B2 (en) | 2000-12-15 | 2010-01-19 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US7933244B2 (en) | 2000-12-15 | 2011-04-26 | Adaptix, Inc. | Multi-carrier communications with group-based subcarrier allocation |
US8743717B2 (en) | 2000-12-15 | 2014-06-03 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
US20020105925A1 (en) * | 2001-01-16 | 2002-08-08 | Shoemake Matthew B. | Jointly controlling transmission rate and power in a communications system |
US7257094B2 (en) * | 2001-01-16 | 2007-08-14 | Texas Instruments Incorporated | Jointly controlling transmission rate and power in a communications system |
US7023824B2 (en) * | 2001-02-27 | 2006-04-04 | Telefonaktiebolaget L M Ericsson (Publ) | Method, apparatus, and system for optimizing transmission power and bit rate in multi-transmission scheme communication systems |
US20020154611A1 (en) * | 2001-02-27 | 2002-10-24 | Anders Khullar | Method, apparatus, and system for optimizing transmission power and bit rate in multi-transmission scheme communication systems |
US20020172212A1 (en) * | 2001-03-27 | 2002-11-21 | Erving Richard H. | Method and system for increasing data throughput in communications channels on an opportunistic basis |
US6909755B2 (en) * | 2001-03-27 | 2005-06-21 | At&T Corp. | Method and system for increasing data throughput in communications channels on an opportunistic basis |
US20020193146A1 (en) * | 2001-06-06 | 2002-12-19 | Mark Wallace | Method and apparatus for antenna diversity in a wireless communication system |
US7099673B2 (en) * | 2001-08-27 | 2006-08-29 | Fujitsu Limited | Mobile communication system, and a radio base station, a radio apparatus and a mobile terminal |
US20030064729A1 (en) * | 2001-08-27 | 2003-04-03 | Atsushi Yamashita | Mobile communication system, and a radio base station, a radio apparatus and a mobile terminal |
US20040047425A1 (en) * | 2001-08-28 | 2004-03-11 | Katsutoshi Itoh | Transmission apparatus, transmission control method, reception apparatus, and reception control method |
US7277492B2 (en) * | 2001-08-28 | 2007-10-02 | Sony Corporation | Transmission apparatus, transmission control method, reception apparatus, and reception control method |
US8812706B1 (en) | 2001-09-06 | 2014-08-19 | Qualcomm Incorporated | Method and apparatus for compensating for mismatched delays in signals of a mobile display interface (MDDI) system |
US8694663B2 (en) | 2001-09-06 | 2014-04-08 | Qualcomm Incorporated | System for transferring digital data at a high rate between a host and a client over a communication path for presentation to a user |
US20080004078A1 (en) * | 2001-09-28 | 2008-01-03 | Barratt Craig H | Method and apparatus to provide multiple-mode spatial processing in a radio receiver |
US8326374B2 (en) | 2001-09-28 | 2012-12-04 | Intel Corporation | Remote unit for providing multiple-mode spatial processing |
US20100202313A1 (en) * | 2001-09-28 | 2010-08-12 | Barratt Craig H | Remote unit for providing spatial processing |
US7996049B2 (en) | 2001-09-28 | 2011-08-09 | Intel Corporation | Remote unit for providing spatial processing |
US7277679B1 (en) * | 2001-09-28 | 2007-10-02 | Arraycomm, Llc | Method and apparatus to provide multiple-mode spatial processing to a terminal unit |
US7702298B2 (en) | 2001-09-28 | 2010-04-20 | Intel Corporation | Method and apparatus to provide multiple-mode spatial processing in a radio receiver |
US20030076797A1 (en) * | 2001-10-18 | 2003-04-24 | Angel Lozano | Rate control technique for layered architectures with multiple transmit and receive antennas |
US7116652B2 (en) * | 2001-10-18 | 2006-10-03 | Lucent Technologies Inc. | Rate control technique for layered architectures with multiple transmit and receive antennas |
US8965304B2 (en) | 2001-11-02 | 2015-02-24 | Nokia Corporation | Multi-mode I/O circuitry supporting low interference signaling schemes for high speed digital interfaces |
US7164649B2 (en) * | 2001-11-02 | 2007-01-16 | Qualcomm, Incorporated | Adaptive rate control for OFDM communication system |
US20090190639A1 (en) * | 2001-11-02 | 2009-07-30 | Nokia Corporation | Multi-mode I/O circuitry supporting low interference signaling schemes for high speed digital interfaces |
US7702293B2 (en) * | 2001-11-02 | 2010-04-20 | Nokia Corporation | Multi-mode I/O circuitry supporting low interference signaling schemes for high speed digital interfaces |
US20030086371A1 (en) * | 2001-11-02 | 2003-05-08 | Walton Jay R | Adaptive rate control for OFDM communication system |
US20030087671A1 (en) * | 2001-11-02 | 2003-05-08 | Nokia Corporation | Multi-mode I/O circuitry supporting low interference signaling schemes for high speed digital interfaces |
US7961687B2 (en) * | 2001-12-07 | 2011-06-14 | Qualcomm Incorporated | Method and apparatus for effecting handoff between different cellular communications systems |
US20080161001A1 (en) * | 2001-12-07 | 2008-07-03 | Qualcomm Incorporated | Method and apparatus for effecting handoff between different cellular communications systems |
US7342954B2 (en) * | 2002-02-25 | 2008-03-11 | Kabushiki Kaisha Toshiba | Adaptive modulation for wireless networks |
US20040004998A1 (en) * | 2002-02-25 | 2004-01-08 | Kabushiki Kaisha Toshiba | Adaptive modulation for wireless networks |
US20030167306A1 (en) * | 2002-03-04 | 2003-09-04 | Diego Kaplan | System and method for optimal short message service (SMS) encoding in a wireless communications device |
US7761511B2 (en) * | 2002-03-04 | 2010-07-20 | Kyocera Corporation | System and method for optimal short message service (SMS) encoding in a wireless communications device |
US20070054632A1 (en) * | 2002-04-01 | 2007-03-08 | Texas Instruments Incorporated | Wireless Network Scheduling Data Frames Including Physical Layer Configuration |
US20030185241A1 (en) * | 2002-04-01 | 2003-10-02 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US7224704B2 (en) * | 2002-04-01 | 2007-05-29 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US20040203961A1 (en) * | 2002-04-11 | 2004-10-14 | Sined S.R.L. | Method and apparatus for remote transmission of data, information and instructions between remote patients and specialized personnel |
US20040208145A1 (en) * | 2002-06-20 | 2004-10-21 | Lg Electronics Inc. | MIMO system and method for radio communication |
US8625507B1 (en) | 2002-07-15 | 2014-01-07 | Cisco Technology, Inc. | Media access control for MIMO wireless network |
US9236928B1 (en) | 2002-07-15 | 2016-01-12 | Cisco Technology, Inc. | Media access control for MIMO wireless network |
US7301924B1 (en) * | 2002-07-15 | 2007-11-27 | Cisco Technology, Inc. | Media access control for MIMO wireless network |
US7929412B1 (en) | 2002-07-15 | 2011-04-19 | Cisco Technology, Inc. | Media access control for MIMO wireless network |
US20040027994A1 (en) * | 2002-08-06 | 2004-02-12 | Baines Steven John | Method of controlling a communications link |
US10187166B2 (en) | 2002-08-06 | 2019-01-22 | Apple Inc. | Method of controlling a communications link |
US9800302B2 (en) | 2002-08-06 | 2017-10-24 | Apple Inc. | Method of controlling a communications link |
US9467249B2 (en) * | 2002-08-06 | 2016-10-11 | Apple Inc. | Method of controlling a communications link |
US8179864B2 (en) * | 2002-08-06 | 2012-05-15 | Rockstar Bidco Lp | Method of controlling a communications link |
US20120189039A1 (en) * | 2002-08-06 | 2012-07-26 | Rockstar Bidco Lp | Method of Controlling a Communications Link |
US8971198B2 (en) * | 2002-08-06 | 2015-03-03 | Steven John Baines | Method of controlling a communications link |
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
US20040054947A1 (en) * | 2002-09-18 | 2004-03-18 | Godfrey Timothy Gordon | Adaptive transmission rate and fragmentation threshold mechanism for local area networks |
US9240871B2 (en) | 2002-10-25 | 2016-01-19 | Qualcomm Incorporated | MIMO WLAN system |
US8203978B2 (en) | 2002-10-25 | 2012-06-19 | Qualcomm Incorporated | Multi-mode terminal in a wireless MIMO system |
US8462643B2 (en) | 2002-10-25 | 2013-06-11 | Qualcomm Incorporated | MIMO WLAN system |
US8873365B2 (en) | 2002-10-25 | 2014-10-28 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US8483188B2 (en) | 2002-10-25 | 2013-07-09 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US8913529B2 (en) | 2002-10-25 | 2014-12-16 | Qualcomm Incorporated | MIMO WLAN system |
US8750151B2 (en) | 2002-10-25 | 2014-06-10 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8218609B2 (en) * | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US8934329B2 (en) | 2002-10-25 | 2015-01-13 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US10382106B2 (en) | 2002-10-25 | 2019-08-13 | Qualcomm Incorporated | Pilots for MIMO communication systems |
US9013974B2 (en) | 2002-10-25 | 2015-04-21 | Qualcomm Incorporated | MIMO WLAN system |
US9967005B2 (en) | 2002-10-25 | 2018-05-08 | Qualcomm Incorporated | Pilots for MIMO communication systems |
US9031097B2 (en) | 2002-10-25 | 2015-05-12 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8355313B2 (en) | 2002-10-25 | 2013-01-15 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8711763B2 (en) | 2002-10-25 | 2014-04-29 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US9048892B2 (en) | 2002-10-25 | 2015-06-02 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US9154274B2 (en) | 2002-10-25 | 2015-10-06 | Qualcomm Incorporated | OFDM communication system with multiple OFDM symbol sizes |
US20040081131A1 (en) * | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US8208364B2 (en) | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8145179B2 (en) | 2002-10-25 | 2012-03-27 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US9312935B2 (en) | 2002-10-25 | 2016-04-12 | Qualcomm Incorporated | Pilots for MIMO communication systems |
US8170513B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US20060056501A1 (en) * | 2003-01-24 | 2006-03-16 | Kenichiro Shinoi | Line quality report accuracy measurement device and accuracy measurement method |
US7672366B2 (en) * | 2003-01-24 | 2010-03-02 | Panasonic Corporation | Line quality report accuracy measurement device and accuracy measurement method |
US8861499B1 (en) * | 2003-02-14 | 2014-10-14 | Marvell International Ltd. | Data rate adaptation in multiple-in-multiple-out systems |
US7761059B2 (en) * | 2003-05-28 | 2010-07-20 | Alcatel-Lucent Usa Inc. | Method of transmitting or receiving with constrained feedback information |
US20040242162A1 (en) * | 2003-05-28 | 2004-12-02 | Lau Kin Nang | Method of transmitting or receiving with constrained feedback information |
US8705579B2 (en) | 2003-06-02 | 2014-04-22 | Qualcomm Incorporated | Generating and implementing a signal protocol and interface for higher data rates |
US8700744B2 (en) | 2003-06-02 | 2014-04-15 | Qualcomm Incorporated | Generating and implementing a signal protocol and interface for higher data rates |
US20060087998A1 (en) * | 2003-06-18 | 2006-04-27 | Nippon Telegraph And Telephone Corp. | Radio packet communication method |
US7400616B2 (en) * | 2003-06-18 | 2008-07-15 | Nippon Telegraph And Telephone Corporation | Wireless packet communication method and wireless packet communication apparatus |
US20050022097A1 (en) * | 2003-07-22 | 2005-01-27 | Jung-Fu Cheng | Adaptive hybrid ARQ algorithms |
US7155655B2 (en) * | 2003-07-22 | 2006-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Adaptive hybrid ARQ algorithms |
US9271192B1 (en) | 2003-08-12 | 2016-02-23 | Marvell International Ltd. | Rate adaptation in wireless systems |
US8705571B2 (en) | 2003-08-13 | 2014-04-22 | Qualcomm Incorporated | Signal interface for higher data rates |
US8635358B2 (en) | 2003-09-10 | 2014-01-21 | Qualcomm Incorporated | High data rate interface |
US8719334B2 (en) | 2003-09-10 | 2014-05-06 | Qualcomm Incorporated | High data rate interface |
US8694652B2 (en) | 2003-10-15 | 2014-04-08 | Qualcomm Incorporated | Method, system and computer program for adding a field to a client capability packet sent from a client to a host |
US8756294B2 (en) | 2003-10-29 | 2014-06-17 | Qualcomm Incorporated | High data rate interface |
US8606946B2 (en) | 2003-11-12 | 2013-12-10 | Qualcomm Incorporated | Method, system and computer program for driving a data signal in data interface communication data link |
US8687658B2 (en) | 2003-11-25 | 2014-04-01 | Qualcomm Incorporated | High data rate interface with improved link synchronization |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US10742358B2 (en) | 2003-12-01 | 2020-08-11 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US9876609B2 (en) | 2003-12-01 | 2018-01-23 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US8670457B2 (en) | 2003-12-08 | 2014-03-11 | Qualcomm Incorporated | High data rate interface with improved link synchronization |
US20050152387A1 (en) * | 2004-01-09 | 2005-07-14 | Yoriko Utsunomiya | Communication method, communication apparatus, and communication system |
US20080181152A1 (en) * | 2004-01-09 | 2008-07-31 | Kabushiki Kaisha Toshiba | Communication method, communication apparatus, and communication system |
US7369511B2 (en) * | 2004-01-09 | 2008-05-06 | Kabushiki Kaisha Toshiba | Communication method, communication apparatus, and communication system |
US8379545B2 (en) | 2004-01-09 | 2013-02-19 | Kabushiki Kaisha Toshiba | Communication method, communication apparatus, and communication system |
US7489652B2 (en) * | 2004-01-15 | 2009-02-10 | Samsung Electronics Co., Ltd. | Method of communications between MIMO stations |
US20050160181A1 (en) * | 2004-01-15 | 2005-07-21 | Samsung Electronics Co., Ltd. | Method of communications between MIMO stations |
US8625625B2 (en) | 2004-03-10 | 2014-01-07 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8730913B2 (en) | 2004-03-10 | 2014-05-20 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8669988B2 (en) | 2004-03-10 | 2014-03-11 | Qualcomm Incorporated | High data rate interface apparatus and method |
US9369914B1 (en) | 2004-03-11 | 2016-06-14 | Marvell International Ltd. | Adaptively determining a data rate of packetized information transmission over a wireless channel |
US8705521B2 (en) | 2004-03-17 | 2014-04-22 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8645566B2 (en) | 2004-03-24 | 2014-02-04 | Qualcomm Incorporated | High data rate interface apparatus and method |
US20070223367A1 (en) * | 2004-04-30 | 2007-09-27 | Koninklijke Philips Electronics, N.V. | Adaptive Mimo Wireless Communicationsi System |
WO2005112483A3 (en) * | 2004-05-07 | 2006-10-19 | Cisco Tech Inc | Data rate shifting methods and techniques |
US7355997B2 (en) | 2004-05-07 | 2008-04-08 | Cisco Technology, Inc. | Data rate shifting methods and techniques |
US20050249157A1 (en) * | 2004-05-07 | 2005-11-10 | Lu Qian | Data rate shifting methods and techniques |
US8630318B2 (en) | 2004-06-04 | 2014-01-14 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8630305B2 (en) | 2004-06-04 | 2014-01-14 | Qualcomm Incorporated | High data rate interface apparatus and method |
US8650304B2 (en) | 2004-06-04 | 2014-02-11 | Qualcomm Incorporated | Determining a pre skew and post skew calibration data rate in a mobile display digital interface (MDDI) communication system |
US20050283705A1 (en) * | 2004-06-18 | 2005-12-22 | Kabushiki Kaisha Toshiba | Bit interleaver for a MIMO system |
US20130077468A1 (en) * | 2004-06-24 | 2013-03-28 | Apple Inc. | Preambles in OFDMA System |
US20110222504A1 (en) * | 2004-06-24 | 2011-09-15 | Nortel Networks Limited | Preambles in ofdma system |
US8340072B2 (en) * | 2004-06-24 | 2012-12-25 | Apple Inc. | Preambles in OFDMA system |
US9832063B2 (en) * | 2004-06-24 | 2017-11-28 | Apple Inc. | Preambles in OFDMA system |
US9450801B2 (en) | 2004-06-24 | 2016-09-20 | Apple Inc. | Preambles in OFDMA system |
US20060029157A1 (en) * | 2004-08-09 | 2006-02-09 | Texas Instruments Incorporated | Wireless precoding methods |
US8023589B2 (en) | 2004-08-09 | 2011-09-20 | Texas Instruments Incorporated | Wireless MIMO transmitter with antenna and tone precoding blocks |
US8693575B2 (en) | 2004-08-09 | 2014-04-08 | Texas Instruments Incorporated | Wireless precoding methods |
US9197300B2 (en) | 2004-08-09 | 2015-11-24 | Texas Instruments Incorporated | Wireless precoding methods |
US7778147B2 (en) * | 2004-09-07 | 2010-08-17 | Samsung Electronics Co., Ltd. | MIMO communication system using an adaptive transmission mode switching technique |
US20060083195A1 (en) * | 2004-09-07 | 2006-04-20 | Samsung Electronics Co., Ltd. | MIMO communication system using an adaptive transmission mode switching technique |
WO2006039098A3 (en) * | 2004-09-30 | 2006-06-08 | Motorola Inc | A method for the selection of forward error correction (fec)/ constellation pairings for digital transmitted segments based on learning radio link adaptation (rla) |
US8031678B2 (en) | 2004-10-15 | 2011-10-04 | Nokia Corporation | Simplified practical rank and mechanism, and associated method, to adapt MIMO modulation in a multi-carrier system with feedback |
US20060084400A1 (en) * | 2004-10-15 | 2006-04-20 | Nokia Corporation | Simplified practical rank and mechanism, and associated method, to adapt MIMO modulation in a multi-carrier system with feedback |
US20080031314A1 (en) * | 2004-10-15 | 2008-02-07 | Nokia Corporation | Simplified Practical Rank And Mechanism, And Associated Method, To Adapt MIMO Modulation In A Multi-Carrier System With Feedback |
US7283499B2 (en) | 2004-10-15 | 2007-10-16 | Nokia Corporation | Simplified practical rank and mechanism, and associated method, to adapt MIMO modulation in a multi-carrier system with feedback |
US8539119B2 (en) | 2004-11-24 | 2013-09-17 | Qualcomm Incorporated | Methods and apparatus for exchanging messages having a digital data interface device message format |
US8699330B2 (en) | 2004-11-24 | 2014-04-15 | Qualcomm Incorporated | Systems and methods for digital data transmission rate control |
US8873584B2 (en) | 2004-11-24 | 2014-10-28 | Qualcomm Incorporated | Digital data interface device |
US8723705B2 (en) | 2004-11-24 | 2014-05-13 | Qualcomm Incorporated | Low output skew double data rate serial encoder |
US8667363B2 (en) | 2004-11-24 | 2014-03-04 | Qualcomm Incorporated | Systems and methods for implementing cyclic redundancy checks |
US8692838B2 (en) | 2004-11-24 | 2014-04-08 | Qualcomm Incorporated | Methods and systems for updating a buffer |
US8797970B2 (en) | 2004-12-07 | 2014-08-05 | Adaptix, Inc. | Method and system for switching antenna and channel assignments in broadband wireless networks |
US8760992B2 (en) | 2004-12-07 | 2014-06-24 | Adaptix, Inc. | Method and system for switching antenna and channel assignments in broadband wireless networks |
US20070116300A1 (en) * | 2004-12-22 | 2007-05-24 | Broadcom Corporation | Channel decoding for wireless telephones with multiple microphones and multiple description transmission |
US8509703B2 (en) * | 2004-12-22 | 2013-08-13 | Broadcom Corporation | Wireless telephone with multiple microphones and multiple description transmission |
US7983720B2 (en) | 2004-12-22 | 2011-07-19 | Broadcom Corporation | Wireless telephone with adaptive microphone array |
US8948416B2 (en) | 2004-12-22 | 2015-02-03 | Broadcom Corporation | Wireless telephone having multiple microphones |
US20060133622A1 (en) * | 2004-12-22 | 2006-06-22 | Broadcom Corporation | Wireless telephone with adaptive microphone array |
US20090209290A1 (en) * | 2004-12-22 | 2009-08-20 | Broadcom Corporation | Wireless Telephone Having Multiple Microphones |
US7656969B2 (en) * | 2005-01-14 | 2010-02-02 | Motorola, Inc. | Dual payload and adaptive modulation |
US20060160495A1 (en) * | 2005-01-14 | 2006-07-20 | Peter Strong | Dual payload and adaptive modulation |
US20060198460A1 (en) * | 2005-03-03 | 2006-09-07 | Texas Instruments Incorporated | Link adaptation for high throughput multiple antenna WLAN systems |
EP1699177A1 (en) * | 2005-03-03 | 2006-09-06 | Texas Instruments Limited | Link adaptation for high throughput multiple antenna WLAN system |
US9178584B2 (en) | 2005-03-11 | 2015-11-03 | Qualcomm Incorporated | System and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates |
US8995547B2 (en) | 2005-03-11 | 2015-03-31 | Qualcomm Incorporated | Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates |
RU2541193C2 (en) * | 2005-03-11 | 2015-02-10 | Квэлкомм Инкорпорейтед | Systems and methods to reduce resources of downlink for provision of feedback by efficiency of channel for adjustment of speeds of data transfer of mimo channel of downlink |
US20060205357A1 (en) * | 2005-03-11 | 2006-09-14 | Byoung-Hoon Kim | Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink MIMO channel data rates |
US7554946B2 (en) | 2005-03-31 | 2009-06-30 | Adc Telecommunications, Inc. | Dynamic reallocation of bandwidth and modulation protocols |
US7574234B2 (en) | 2005-03-31 | 2009-08-11 | Adc Telecommunications, Inc. | Dynamic readjustment of power |
US20080137575A1 (en) * | 2005-03-31 | 2008-06-12 | Adc Telecommunications, Inc. | Dynamic reallocation of bandwidth and modulation protocols |
USRE44398E1 (en) | 2005-03-31 | 2013-07-30 | Adc Telecommunications, Inc. | Dynamic reallocation of bandwidth and modulation protocols |
US20080168199A1 (en) * | 2005-03-31 | 2008-07-10 | Adc Telecommunications, Inc. | Dynamic readjustment of power |
US20060223514A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Signal enhancement through diversity |
US20060227805A1 (en) * | 2005-03-31 | 2006-10-12 | Adc Telecommunications, Inc. | Buffers handling multiple protocols |
US20080254784A1 (en) * | 2005-03-31 | 2008-10-16 | Adc Telecommunications, Inc. | Dynamic reconfiguration of resources through page headers |
US8036156B2 (en) | 2005-03-31 | 2011-10-11 | Adc Telecommunications, Inc. | Dynamic reconfiguration of resources through page headers |
US20060227736A1 (en) * | 2005-03-31 | 2006-10-12 | Adc Telecommunications, Inc. | Dynamic reallocation of bandwidth and modulation protocols |
US20060222054A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Dynamic frequency hopping |
US20060222020A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Time start in the forward path |
US20060222087A1 (en) * | 2005-03-31 | 2006-10-05 | Adc Telecommunications, Inc. | Methods and systems for handling underflow and overflow in a software defined radio |
US7640019B2 (en) | 2005-03-31 | 2009-12-29 | Adc Telecommunications, Inc. | Dynamic reallocation of bandwidth and modulation protocols |
US7583735B2 (en) | 2005-03-31 | 2009-09-01 | Adc Telecommunications, Inc. | Methods and systems for handling underflow and overflow in a software defined radio |
US7593450B2 (en) | 2005-03-31 | 2009-09-22 | Adc Telecommunications, Inc. | Dynamic frequency hopping |
US8855226B2 (en) | 2005-05-12 | 2014-10-07 | Qualcomm Incorporated | Rate selection with margin sharing |
US8358714B2 (en) | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
US20120008517A1 (en) * | 2005-08-19 | 2012-01-12 | Panasonic Corporation | Communication apparatus and communication method |
US9166736B2 (en) * | 2005-08-19 | 2015-10-20 | Panasonic Intellectual Property Corporation Of America | Communication apparatus and communication method |
US8099106B2 (en) * | 2005-08-24 | 2012-01-17 | Qualcomm Incorporated | Method and apparatus for classifying user morphology for efficient use of cell phone system resources |
US20070049295A1 (en) * | 2005-08-24 | 2007-03-01 | Soliman Samir S | Method and apparatus for classifying user morphology for efficient use of cell phone system resources |
US20070104149A1 (en) * | 2005-11-04 | 2007-05-10 | Samsung Electronics Co., Ltd. | Method and system for providing adaptive modulation and coding in a multi-carrier wireless network |
US8218563B2 (en) * | 2005-11-04 | 2012-07-10 | Samsung Electronics Co., Ltd. | Method and system for providing adaptive modulation and coding in a multi-carrier wireless network |
WO2007052983A1 (en) * | 2005-11-04 | 2007-05-10 | Samsung Electronics Co., Ltd. | Method and system for providing adaptive modulation and coding in a multi-carrier wireless network |
US8692839B2 (en) | 2005-11-23 | 2014-04-08 | Qualcomm Incorporated | Methods and systems for updating a buffer |
US8611215B2 (en) | 2005-11-23 | 2013-12-17 | Qualcomm Incorporated | Systems and methods for digital data transmission rate control |
US8730069B2 (en) | 2005-11-23 | 2014-05-20 | Qualcomm Incorporated | Double data rate serial encoder |
US8971442B2 (en) | 2006-01-11 | 2015-03-03 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
US9991992B2 (en) | 2006-01-11 | 2018-06-05 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing |
US8295401B2 (en) | 2006-01-11 | 2012-10-23 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
US10560223B2 (en) | 2006-01-11 | 2020-02-11 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
US11258542B2 (en) | 2006-01-11 | 2022-02-22 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
US9621251B2 (en) | 2006-01-11 | 2017-04-11 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing |
US20070211822A1 (en) * | 2006-01-11 | 2007-09-13 | Interdigital Technology Corporation | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
US8953481B2 (en) * | 2006-01-20 | 2015-02-10 | Blackberry Limited | Methods and systems for scheduling in a virtual MIMO communication environment |
US10356805B2 (en) | 2006-01-20 | 2019-07-16 | Blackberry Limited | Methods and systems for scheduling in a virtual MIMO communication environment |
US9432162B2 (en) | 2006-01-20 | 2016-08-30 | Blackberry Limited | Methods and systems for scheduling a virtual MIMO communication environment |
US9992792B2 (en) | 2006-01-20 | 2018-06-05 | Blackberry Limited | Methods and systems for scheduling a virtual MIMO communication environment |
US20130114444A1 (en) * | 2006-01-20 | 2013-05-09 | Research In Motion Limited | Methods and Systems for Scheduling in a Virtual MIMO Communication Environment |
US7773951B2 (en) * | 2006-05-23 | 2010-08-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for generating channel quality information for wireless communication |
US20110105046A1 (en) * | 2006-05-23 | 2011-05-05 | Karl James Molnar | Method and Apparatus for Generating Channel Quality Information for Wireless Communication |
US20070275665A1 (en) * | 2006-05-23 | 2007-11-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for generating channel quality information for wireless communication |
US8331464B2 (en) | 2006-05-26 | 2012-12-11 | Lg Electronics Inc. | Phase shift based precoding method and transceiver for supporting the same |
US8000401B2 (en) | 2006-05-26 | 2011-08-16 | Lg Electronics Inc. | Signal generation using phase-shift based pre-coding |
US20070280373A1 (en) * | 2006-05-26 | 2007-12-06 | Lg Electronics Inc. | Phase shift based precoding method and transceiver for supporting the same |
WO2007139325A1 (en) * | 2006-05-26 | 2007-12-06 | Lg Electronics Inc. | Signal generation using phase-shift based pre-coding |
US20100074360A1 (en) * | 2006-05-26 | 2010-03-25 | Moon-Il Lee | Signal generation using phase-shift based pre-coding |
US20070274411A1 (en) * | 2006-05-26 | 2007-11-29 | Lg Electronics Inc. | Signal generation using phase-shift based pre-coding |
CN101461205B (en) * | 2006-05-26 | 2013-03-13 | Lg电子株式会社 | Signal generation using phase-shift based pre-coding |
US8036286B2 (en) | 2006-05-26 | 2011-10-11 | Lg Electronics, Inc. | Signal generation using phase-shift based pre-coding |
CN101558642B (en) * | 2006-05-26 | 2011-01-26 | Lg电子株式会社 | Phase shift based precoding method and transceiver for supporting the same |
US20100074309A1 (en) * | 2006-05-26 | 2010-03-25 | Moon Il Lee | Phase shift based precoding method and transceiver for supporting the same |
US8284849B2 (en) | 2006-05-26 | 2012-10-09 | Lg Electronics Inc. | Phase shift based precoding method and transceiver for supporting the same |
KR100934657B1 (en) | 2006-05-26 | 2009-12-31 | 엘지전자 주식회사 | Phase shift based precoding method and transceiver |
US20090323863A1 (en) * | 2006-05-26 | 2009-12-31 | Moon-Il Lee | Signal generation using phase-shift based pre-coding |
US7792084B2 (en) | 2006-08-29 | 2010-09-07 | Panasonic Corporation | MIMO antenna apparatus controlling number of streams and modulation and demodulation method |
US20080069038A1 (en) * | 2006-08-29 | 2008-03-20 | Atsushi Yamamoto | MIMO antenna apparatus controlling number of streams and modulation and demodulation method |
US8135085B2 (en) | 2006-09-19 | 2012-03-13 | Lg Electroncis Inc. | Method of transmitting using phase shift-based precoding and an apparatus for implementing the same in a wireless communication system |
US8213530B2 (en) | 2006-09-19 | 2012-07-03 | Lg Electronics Inc. | Method of transmitting using phase shift-based precoding and an apparatus for implementing the same in a wireless communication system |
US7839944B2 (en) | 2006-09-19 | 2010-11-23 | Lg Electronics, Inc. | Method of performing phase shift-based precoding and an apparatus for supporting the same in a wireless communication system |
US7881395B2 (en) | 2006-09-19 | 2011-02-01 | Lg Electronics, Inc. | Method of transmitting using phase shift-based precoding and an apparatus for implementing the same in a wireless communication system |
US20110149857A1 (en) * | 2006-09-19 | 2011-06-23 | Moon Il Lee | Method of transmitting using phase shift-based precoding and an apparatus for implementing the same in a wireless communication system |
US20110194650A1 (en) * | 2006-09-19 | 2011-08-11 | Moon Il Lee | Method of transmitting using phase shift-based precoding and an apparatus for implementing the same in a wireless communication system |
US20080205533A1 (en) * | 2006-09-19 | 2008-08-28 | Lg Electronics Inc. | Method of transmitting using phase shift-based precoding and apparatus for implementing the same in a wireless communication system |
US20080089442A1 (en) * | 2006-09-19 | 2008-04-17 | Lg Electronics Inc. | method of performing phase shift-based precoding and an apparatus for supporting the same in a wireless communication system |
KR100917889B1 (en) * | 2006-11-01 | 2009-09-16 | 삼성전자주식회사 | Apparatus and method for wireless communication |
US20080101458A1 (en) * | 2006-11-01 | 2008-05-01 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless communications |
US9609382B2 (en) | 2006-11-01 | 2017-03-28 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless communications |
CN101174919B (en) * | 2006-11-01 | 2012-01-25 | 三星电子株式会社 | Apparatus and method for wireless communications |
US20080101459A1 (en) * | 2006-11-01 | 2008-05-01 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless communications |
WO2008054091A1 (en) * | 2006-11-01 | 2008-05-08 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless communications |
US9014257B2 (en) | 2006-11-01 | 2015-04-21 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless communications |
US7899132B2 (en) | 2007-02-14 | 2011-03-01 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20100014608A1 (en) * | 2007-02-14 | 2010-01-21 | Moon Il Lee | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US8284865B2 (en) | 2007-02-14 | 2012-10-09 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US7885349B2 (en) | 2007-02-14 | 2011-02-08 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20080198946A1 (en) * | 2007-02-14 | 2008-08-21 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20110110405A1 (en) * | 2007-02-14 | 2011-05-12 | Moon Il Lee | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20080240050A1 (en) * | 2007-03-28 | 2008-10-02 | Harris Corporation, Corporation The The State Of Delaware | Tdma mobile ad-hoc network (manet) with second order timing and tracking |
US7974402B2 (en) | 2007-03-28 | 2011-07-05 | Harris Corporation | TDMA mobile ad-hoc network (MANET) with second order timing and tracking |
US20080285453A1 (en) * | 2007-05-18 | 2008-11-20 | International Business Machines Corporation | Method for monitoring ber in an infiniband environment |
US7715323B2 (en) | 2007-05-18 | 2010-05-11 | International Business Machines Corporation | Method for monitoring BER in an infiniband environment |
US7869379B2 (en) | 2007-05-18 | 2011-01-11 | International Business Machines Corporation | Method for monitoring channel eye characteristics in a high-speed SerDes data link |
US20080285443A1 (en) * | 2007-05-18 | 2008-11-20 | International Business Machines Corporation | Method for monitoring channel eye characteristics in a high-speed serdes data link |
US8885630B2 (en) | 2007-06-14 | 2014-11-11 | Harris Corporation | TDMA communications system with configuration beacon and associated method |
US20080310390A1 (en) * | 2007-06-14 | 2008-12-18 | Harris Corporation | Tdma communications system with configuration beacon and associated method |
US8670500B2 (en) | 2007-09-19 | 2014-03-11 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US7961808B2 (en) | 2007-09-19 | 2011-06-14 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20100202500A1 (en) * | 2007-09-19 | 2010-08-12 | Bin Chul Ihm | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US8208576B2 (en) | 2007-09-19 | 2012-06-26 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20100226417A1 (en) * | 2007-09-19 | 2010-09-09 | Bin Chul Ihm | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US7970074B2 (en) | 2007-09-19 | 2011-06-28 | Lg Electronics Inc. | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same |
US20090111507A1 (en) * | 2007-10-30 | 2009-04-30 | Broadcom Corporation | Speech intelligibility in telephones with multiple microphones |
US8428661B2 (en) | 2007-10-30 | 2013-04-23 | Broadcom Corporation | Speech intelligibility in telephones with multiple microphones |
US20100055708A1 (en) * | 2008-08-26 | 2010-03-04 | Becton, Dickinson And Company | Assay for Chlamydia trachomatis by amplification and detection of Chlamydia trachomatis cytotoxin gene |
US20100296407A1 (en) * | 2008-09-16 | 2010-11-25 | Qualcomm Incorporated | Methods and systems for transmission mode selection in a multi channel communication system |
US8462653B2 (en) | 2008-09-16 | 2013-06-11 | Qualcomm Incorporated | Methods and system for transmission mode selection in a multi channel communication system |
US20100067401A1 (en) * | 2008-09-16 | 2010-03-18 | Qualcomm Incorporated | Methods and systems for transmission mode selection in a multi channel communication system |
US8619620B2 (en) * | 2008-09-16 | 2013-12-31 | Qualcomm Incorporated | Methods and systems for transmission mode selection in a multi channel communication system |
EP2385643A1 (en) * | 2010-05-03 | 2011-11-09 | Alcatel Lucent | A method for selection of a modulation and coding scheme, and a device therefor |
US11128355B2 (en) | 2010-12-10 | 2021-09-21 | Sun Patent Trust | Signal generation method and signal generation device |
US11575412B2 (en) | 2010-12-10 | 2023-02-07 | Sun Patent Trust | Signal generation method and signal generation device |
US11804880B2 (en) | 2010-12-10 | 2023-10-31 | Sun Patent Trust | Signal generation method and signal generation device |
US10305556B2 (en) | 2010-12-10 | 2019-05-28 | Sun Patent Trust | Signal generation method and signal generation device |
US10038483B2 (en) | 2010-12-10 | 2018-07-31 | Sun Patent Trust | Signal generation method and signal generation device |
US10644768B2 (en) | 2010-12-10 | 2020-05-05 | Sun Patent Trust | Signal generation method and signal generation device |
US20140095755A1 (en) * | 2012-09-28 | 2014-04-03 | Jie Gao | Using adaptive channel selection to enhance the performance of wireless docking |
US9514079B2 (en) * | 2012-09-28 | 2016-12-06 | Intel Corporation | Using adaptive channel selection to enhance the performance of wireless docking |
US9641358B2 (en) * | 2013-05-17 | 2017-05-02 | Cambium Networks Ltd | Adaptive modulation |
US20160072648A1 (en) * | 2013-05-17 | 2016-03-10 | Peter Strong | Adaptive modulation |
US20160226740A1 (en) * | 2013-09-27 | 2016-08-04 | Thomson Licensing | Method for testing a wireless link of a wi-fi node, and circuit performing the method |
US10862789B2 (en) * | 2013-09-27 | 2020-12-08 | Airties Belgium Sprl | Method for testing a wireless link of a Wi-Fi node, and circuit performing the method |
US11641318B2 (en) | 2013-09-27 | 2023-05-02 | Airties Belgium Sprl | Method for testing a wireless link of a Wi-Fi node, and circuit performing the method |
US9961174B2 (en) * | 2014-01-15 | 2018-05-01 | Qualcomm Incorporated | Analog behavior modeling for 3-phase signaling |
US20150201052A1 (en) * | 2014-01-15 | 2015-07-16 | Qualcomm Incorporated | Analog behavior modeling for 3-phase signaling |
US10250309B2 (en) | 2016-03-24 | 2019-04-02 | Huawei Technologies, Co., Ltd. | System and method for downlink channel estimation in massive multiple-input-multiple-output (MIMO) |
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WO2002025853A3 (en) | 2002-08-22 |
WO2002025853A2 (en) | 2002-03-28 |
US20110179336A1 (en) | 2011-07-21 |
US20020056066A1 (en) | 2002-05-09 |
US7761775B2 (en) | 2010-07-20 |
US7921349B2 (en) | 2011-04-05 |
US7191381B2 (en) | 2007-03-13 |
US8418033B2 (en) | 2013-04-09 |
AU2001291131A1 (en) | 2002-04-02 |
US20100318861A1 (en) | 2010-12-16 |
US20050031044A1 (en) | 2005-02-10 |
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